ASME B18.3 Hexagon Socket Head Cap Screws
ASME B18.3 Hexagon Socket Head Cap Screws Standard covers complete general and dimensional data for hexagon socket head cap screws recognized as an American National Standard. Also included are appendices that provide specifications for hexagon socket gages and gaging, tables showing applicability of keys and bits to these screws, drill and counterbore sizes for socket head cap screws, and formulas used for dimensional data. However, where questions arise concerning acceptance of product, the dimensions in the tables shall govern over recalculation by formula. Recess dimensions for Type VI recesses are given in Mandatory Appendix III.
ASME B18.3 Hexagon Socket Head Cap Screw Dimensions (mm)
| Nominal Size | Body Diameter, D | Head Diameter, A | Head Height, H | Chamfer or Radius, C |
Socket Width Across Flats, J | Key Engagement, T | Wall Thickness, G | Chamfer or Radius, K | Minimum Juncture Radius, R | Fillet Juncture Diameter, F | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Max. | Min. | Max. | Min. | Max. | Min. | Max. | Max. | Min. | Min. | Min. | Max. | Max. | Min. | |||
| #0 | 0.0600 | 1.524 | 1.448 | 2.438 | 2.311 | 1.524 | 1.448 | 0.102 | 1.295 | 1.270 | 0.635 | 0.508 | 0.178 | 0.051 | 1.880 | 1.575 |
| #1 | 0.0730 | 1.854 | 1.778 | 2.997 | 2.845 | 1.854 | 1.778 | 0.127 | 1.613 | 1.588 | 0.787 | 0.635 | 0.178 | 0.076 | 2.210 | 1.905 |
| #2 | 0.0860 | 2.184 | 2.083 | 3.556 | 3.404 | 2.184 | 2.108 | 0.203 | 2.009 | 1.984 | 0.965 | 0.737 | 0.178 | 0.076 | 2.591 | 2.286 |
| #3 | 0.0990 | 2.515 | 2.413 | 4.089 | 3.912 | 2.515 | 2.413 | 0.203 | 2.009 | 1.984 | 1.118 | 0.864 | 0.178 | 0.102 | 2.921 | 2.591 |
| #4 | 0.1120 | 2.845 | 2.743 | 4.648 | 4.470 | 2.845 | 2.743 | 0.229 | 2.418 | 2.380 | 1.295 | 0.965 | 0.203 | 0.102 | 3.302 | 2.972 |
| #5 | 0.1250 | 3.175 | 3.048 | 5.207 | 5.029 | 3.175 | 3.073 | 0.305 | 2.418 | 2.380 | 1.448 | 1.092 | 0.203 | 0.127 | 3.683 | 3.353 |
| #6 | 0.1380 | 3.505 | 3.378 | 5.740 | 5.537 | 3.505 | 3.404 | 0.330 | 2.822 | 2.779 | 1.626 | 1.194 | 0.203 | 0.127 | 4.013 | 3.658 |
| #8 | 0.1640 | 4.166 | 4.039 | 6.858 | 6.655 | 4.166 | 4.039 | 0.356 | 3.622 | 3.571 | 1.956 | 1.422 | 0.203 | 0.152 | 4.775 | 4.369 |
| #10 | 0.1900 | 4.826 | 4.674 | 7.925 | 7.696 | 4.826 | 4.699 | 0.457 | 4.031 | 3.967 | 2.286 | 1.651 | 0.203 | 0.152 | 5.537 | 5.131 |
| 1/4 | 0.2500 | 6.350 | 6.198 | 9.525 | 9.271 | 6.350 | 6.198 | 0.635 | 4.826 | 4.762 | 3.048 | 2.413 | 0.254 | 0.178 | 7.061 | 6.629 |
| 5/16 | 0.3125 | 7.950 | 7.747 | 11.913 | 11.608 | 7.925 | 7.772 | 0.838 | 6.426 | 6.350 | 3.835 | 3.023 | 0.254 | 0.229 | 8.814 | 8.357 |
| 3/8 | 0.3750 | 9.525 | 9.347 | 14.275 | 13.970 | 9.525 | 9.347 | 1.016 | 8.026 | 7.938 | 4.623 | 3.632 | 0.254 | 0.305 | 10.541 | 10.084 |
| 7/16 | 0.4375 | 11.125 | 10.897 | 16.662 | 16.307 | 11.125 | 10.922 | 1.194 | 9.627 | 9.525 | 5.410 | 4.216 | 0.381 | 0.356 | 12.294 | 11.811 |
| 1/2 | 0.5000 | 12.700 | 12.497 | 19.050 | 18.669 | 12.700 | 12.497 | 1.397 | 11.227 | 11.112 | 6.223 | 4.826 | 0.381 | 0.406 | 14.021 | 13.487 |
| 5/8 | 0.6250 | 15.875 | 15.646 | 23.825 | 23.393 | 15.875 | 15.646 | 1.778 | 12.827 | 12.700 | 7.798 | 6.045 | 0.381 | 0.533 | 17.501 | 16.866 |
| 3/4 | 0.7500 | 19.050 | 18.821 | 28.575 | 28.118 | 19.050 | 18.796 | 2.159 | 16.027 | 15.875 | 9.398 | 7.239 | 0.381 | 0.635 | 21.031 | 20.320 |
| 7/8 | 0.8750 | 22.225 | 21.971 | 33.325 | 32.842 | 22.225 | 21.946 | 2.540 | 19.228 | 19.050 | 10.973 | 8.458 | 0.508 | 0.787 | 24.460 | 23.673 |
| 1 | 1.0000 | 25.400 | 25.121 | 38.100 | 37.567 | 25.400 | 25.095 | 2.896 | 19.228 | 19.050 | 12.573 | 9.652 | 0.508 | 0.864 | 27.940 | 27.127 |
| 1 1/8 | 1.1250 | 28.575 | 28.169 | 42.875 | 42.291 | 28.575 | 28.219 | 3.277 | 22.479 | 22.225 | 14.148 | 10.871 | 0.508 | 0.991 | 31.369 | 30.429 |
| 1 1/4 | 1.2500 | 31.750 | 31.344 | 47.625 | 47.041 | 31.750 | 31.394 | 3.658 | 22.479 | 22.225 | 15.748 | 12.065 | 0.508 | 1.118 | 34.798 | 33.858 |
| 1 3/8 | 1.3750 | 34.925 | 34.468 | 52.375 | 51.765 | 34.925 | 34.544 | 4.064 | 25.908 | 25.400 | 17.323 | 13.284 | 0.508 | 1.219 | 38.227 | 37.236 |
| 1 1/2 | 1.5000 | 38.100 | 37.643 | 57.150 | 56.490 | 38.100 | 37.719 | 4.470 | 25.908 | 25.400 | 18.923 | 14.478 | 0.508 | 1.321 | 41.656 | 40.665 |
| 1 3/4 | 1.7500 | 44.450 | 43.942 | 66.675 | 65.964 | 44.450 | 44.044 | 5.258 | 32.385 | 31.750 | 22.098 | 16.891 | 0.508 | 1.575 | 48.514 | 47.473 |
| 2 | 2.0000 | 50.800 | 50.241 | 76.200 | 75.438 | 50.800 | 50.368 | 6.045 | 38.862 | 38.100 | 25.273 | 19.304 | 0.508 | 1.803 | 55.372 | 54.051 |
| 2 1/4 | 2.2500 | 57.150 | 56.591 | 85.725 | 84.938 | 57.150 | 56.693 | 6.833 | 45.339 | 44.450 | 28.448 | 21.717 | 0.914 | 2.032 | 62.230 | 60.909 |
| 2 1/2 | 2.5000 | 63.500 | 62.890 | 95.250 | 94.412 | 63.500 | 63.017 | 7.620 | 45.339 | 44.450 | 31.623 | 24.130 | 0.914 | 2.235 | 69.088 | 67.615 |
| 2 3/4 | 2.7500 | 69.850 | 69.240 | 104.775 | 103.886 | 69.850 | 69.342 | 8.433 | 51.816 | 50.800 | 34.798 | 26.543 | 0.914 | 2.464 | 75.946 | 74.574 |
| 3 | 3.0000 | 76.200 | 75.590 | 114.300 | 113.386 | 76.200 | 75.667 | 9.220 | 58.293 | 57.150 | 37.973 | 28.956 | 0.914 | 2.692 | 82.804 | 81.432 |
| 3 1/4 | 3.2500 | 82.550 | 81.940 | 123.825 | 122.860 | 82.550 | 81.991 | 10.008 | 58.293 | 57.150 | 41.148 | 31.369 | 0.914 | 2.896 | 89.662 | 88.290 |
| 3 1/2 | 3.5000 | 88.900 | 88.290 | 133.350 | 132.359 | 88.900 | 88.341 | 10.820 | 71.247 | 69.850 | 44.323 | 33.782 | 0.914 | 3.150 | 96.520 | 95.148 |
| 3 3/4 | 3.7500 | 95.250 | 94.640 | 142.875 | 141.834 | 95.250 | 94.666 | 11.633 | 71.247 | 69.850 | 47.498 | 36.195 | 0.914 | 3.404 | 103.378 | 102.006 |
| 4 | 4.0000 | 101.600 | 100.990 | 152.400 | 151.333 | 101.600 | 100.990 | 12.421 | 77.724 | 76.200 | 50.673 | 38.608 | 0.914 | 3.632 | 110.236 | 108.864 |
ASME B18.3 Hexagon Socket Head Cap Screw Length Tolerances(mm)
| Nominal Size | Basic Screw Diameter | Body Diameter, D | Head Diameter, A | Head Height, H | Maximum Chamfer or Radius, C | Nominal Hexagon Socket Size, J | Minimum Key Engagement, T | Minimum Wall Thickness, G | Maximum Chamfer or Radius, K | Fillet Juncture Diameter, F | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Max. | Min. | Max. | Min. | Max. | Min. | Nom. | Dec. | Max. | Min. | ||||||
| #0 | 0.0600 | 1.524 | 1.44272 | 2.4384 | 2.3114 | 1.524 | 1.4478 | 0.1016 | ... | 1.27 | 0.635 | 0.508 | 0.1778 | 1.8796 | 1.5748 |
| #1 | 0.0730 | 1.8542 | 1.7653 | 2.9972 | 2.8448 | 1.8542 | 1.778 | 0.127 | 1/16 | 1.5748 | 0.7874 | 0.635 | 0.1778 | 2.2098 | 1.905 |
| #2 | 0.0860 | 2.1844 | 2.08788 | 3.556 | 3.4036 | 2.1844 | 2.1082 | 0.2032 | 5/64 | 1.9812 | 0.9652 | 0.7366 | 0.1778 | 2.5908 | 2.286 |
| #3 | 0.0990 | 2.5146 | 2.41046 | 4.0894 | 3.9116 | 2.5146 | 2.413 | 0.2032 | 5/64 | 1.9812 | 1.1176 | 0.8636 | 0.1778 | 2.921 | 2.5908 |
| #4 | 0.1120 | 2.8448 | 2.7305 | 4.6482 | 4.4704 | 2.8448 | 2.7432 | 0.2286 | 3/32 | 2.3876 | 1.2954 | 0.9652 | 0.2032 | 3.302 | 2.9718 |
| #5 | 0.1250 | 3.175 | 3.05308 | 5.207 | 5.0292 | 3.175 | 3.0734 | 0.3048 | 3/32 | 2.3876 | 1.4478 | 1.0922 | 0.2032 | 3.683 | 3.3528 |
| #6 | 0.1380 | 3.5052 | 3.37566 | 5.7404 | 5.4864 | 3.5052 | 3.4036 | 0.3302 | 7/64 | 2.7686 | 1.6256 | 1.1938 | 0.2032 | 4.0132 | 3.6576 |
| #8 | 0.1640 | 4.1656 | 4.0259 | 6.858 | 6.5278 | 4.1656 | 4.0386 | 0.3556 | 9/64 | 3.5814 | 1.9558 | 1.4224 | 0.2032 | 4.7752 | 4.3688 |
| #10 | 0.1900 | 4.826 | 4.6736 | 7.9248 | 7.5692 | 4.826 | 4.699 | 0.4572 | 5/32 | 3.9624 | 2.286 | 1.651 | 0.2032 | 5.5372 | 5.1308 |
| #12 | 0.2160 | 5.4864 | 5.3213 | 8.2296 | 7.9756 | 5.4864 | 5.334 | 0.5588 | 5/32 | 3.9624 | 2.6162 | 2.0828 | 0.254 | - | - |
| 1/4 | 0.2500 | 6.35 | 6.1849 | 9.525 | 8.9916 | 6.35 | 6.1976 | 0.635 | 3/16 | 4.7752 | 3.048 | 2.413 | 0.254 | 7.0612 | 6.6294 |
| 5/16 | 0.3125 | 7.9375 | 7.75462 | 11.9126 | 11.3284 | 7.9248 | 7.7724 | 0.8382 | 1/4 | 6.35 | 3.8354 | 3.0226 | 0.254 | 8.8138 | 8.3566 |
| 3/8 | 0.3750 | 9.525 | 9.34212 | 14.2748 | 13.716 | 9.525 | 9.3472 | 1.016 | 5/16 | 7.9248 | 4.6228 | 3.6322 | 0.254 | 10.541 | 10.0838 |
| 7/16 | 0.4375 | 11.1125 | 10.90676 | 16.6624 | 16.0274 | 11.1252 | 10.922 | 1.1938 | 3/8 | 9.525 | 5.4102 | 4.2164 | 0.381 | 12.2936 | 11.811 |
| 1/2 | 0.5000 | 12.7 | 12.49426 | 19.05 | 18.415 | 12.7 | 12.4968 | 1.397 | 3/8 | 9.525 | 6.223 | 4.826 | 0.381 | 14.0208 | 13.4874 |
| 9/16 | 0.5625 | 14.2875 | 14.06652 | 21.4122 | 21.0058 | 14.2748 | 14.0716 | 1.5748 | 7/16 | 11.0998 | 7.0104 | 5.4356 | 0.381 | - | - |
| 5/8 | 0.6250 | 15.875 | 15.65402 | 23.8252 | 23.2156 | 15.875 | 15.6464 | 1.778 | 1/2 | 12.7 | 7.7978 | 6.0452 | 0.381 | 17.5006 | 16.8656 |
| 3/4 | 0.7500 | 19.05 | 18.81124 | 28.575 | 27.7876 | 19.05 | 18.796 | 2.159 | 5/8 | 15.875 | 9.398 | 7.239 | 0.381 | 21.0312 | 20.32 |
| 7/8 | 0.8750 | 22.225 | 21.96338 | 33.3248 | 32.7914 | 22.225 | 21.9456 | 2.54 | 3/4 | 19.05 | 10.9728 | 8.4582 | 0.508 | 24.4602 | 23.6728 |
| 1 | 1.0000 | 25.4 | 25.11044 | 38.1 | 37.4904 | 25.4 | 25.0952 | 2.8956 | 3/4 | 19.05 | 12.573 | 9.652 | 0.508 | 27.94 | 27.1272 |
| 1 1/8 | 1.1250 | 28.575 | 28.15844 | 42.8752 | 42.291 | 28.575 | 28.2194 | 3.2766 | 7/8 | 22.225 | 14.1478 | 10.8712 | 0.508 | 31.369 | 30.4292 |
| 1 1/4 | 1.2500 | 31.75 | 31.33344 | 47.625 | 47.0408 | 31.75 | 31.3944 | 3.6576 | 7/8 | 22.225 | 15.748 | 12.065 | 0.508 | 34.798 | 33.8582 |
| 1 3/8 | 1.3750 | 34.925 | 34.46272 | 52.3748 | 51.7652 | 34.925 | 34.544 | 4.064 | 1 | 25.4 | 17.3228 | 13.2842 | 0.508 | 38.227 | 37.2364 |
| 1 1/2 | 1.5000 | 38.1 | 37.63772 | 57.15 | 56.4896 | 38.1 | 37.719 | 4.4704 | 1 | 25.4 | 18.923 | 14.478 | 0.508 | 41.656 | 40.6654 |
| 1 3/4 | 1.7500 | 44.45 | 43.9293 | 66.675 | 65.9638 | 44.45 | 44.0436 | 5.2578 | 1 1/4 | 31.75 | 22.098 | 16.891 | 0.508 | 48.514 | 47.4726 |
| 2 | 2.0000 | 50.8 | 50.2412 | 76.2 | 75.438 | 50.8 | 50.3682 | 6.0452 | 1 1/2 | 38.1 | 25.273 | 19.304 | 0.508 | 55.372 | 54.0512 |
| 2 1/4 | 2.2500 | 57.15 | 56.5912 | 85.725 | 84.9376 | 57.15 | 56.6928 | 6.8326 | 1 3/4 | 44.45 | 28.448 | 21.717 | 0.9144 | 62.23 | 60.9092 |
| 2 1/2 | 2.5000 | 63.5 | 62.89548 | 95.25 | 94.4118 | 63.5 | 63.0174 | 7.62 | 1 3/4 | 44.45 | 31.623 | 24.13 | 0.9144 | 69.088 | 67.6148 |
| 2 3/4 | 2.7500 | 69.85 | 69.24548 | 104.775 | 103.886 | 69.85 | 69.342 | 8.4328 | 2 | 50.8 | 34.798 | 26.543 | 0.9144 | 75.946 | 74.5744 |
| 3 | 3.0000 | 76.2 | 75.59548 | 114.3 | 113.3856 | 76.2 | 75.6666 | 9.1948 | 2 1/4 | 57.15 | 37.973 | 28.956 | 0.9144 | 82.804 | 81.4324 |
| 3 1/4 | 3.2500 | 82.55 | 81.94548 | 123.825 | 122.8598 | 82.55 | 81.9912 | 10.0076 | 2 1/4 | 57.15 | 41.148 | 31.369 | 0.9144 | 89.662 | 88.2904 |
| 3 1/2 | 3.5000 | 88.9 | 88.29548 | 133.35 | 132.3594 | 88.9 | 88.3412 | 10.8204 | 2 3/4 | 69.85 | 44.323 | 33.782 | 0.9144 | 96.52 | 95.1484 |
| 3 3/4 | 3.7500 | 95.25 | 94.64548 | 142.875 | 141.8336 | 95.25 | 94.6658 | 11.6332 | 2 3/4 | 69.85 | 47.498 | 36.195 | 0.9144 | 103.378 | 102.0064 |
| 4 | 4.0000 | 101.6 | 100.99548 | 152.4 | 151.3332 | 101.6 | 100.9904 | 12.4206 | 3 | 76.2 | 50.673 | 38.608 | 0.9144 | 110.236 | 108.8644 |
ASME B18.3 Body and Grip Lengths for Socket Head Cap Screws(mm)
| Nominal Size |
0 | 1 | 2 | 3 | 4 | 5 | 6 | 8 | 10 | 1/4 | 5/16 | 3/8 | 7/16 | 1/2 | 5/8 | 3/4 | 7/8 | 1 | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Nominal Length | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB |
| 19.05 | 6.35 | 4.83 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... |
| 22.35 | 6.35 | 4.83 | 6.35 | 4.32 | 6.35 | 4.06 | 6.35 | 3.81 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... |
| 25.40 | 12.70 | 11.18 | 6.35 | 4.32 | 6.35 | 4.06 | 6.35 | 3.81 | 6.35 | 3.05 | 6.35 | 3.05 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... |
| 31.75 | 19.05 | 17.53 | 15.75 | 13.97 | 15.75 | 13.72 | 15.75 | 13.21 | 6.35 | 3.05 | 6.35 | 3.05 | 12.70 | 8.64 | 9.65 | 5.59 | 9.65 | 4.32 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... |
| 38.10 | ... | ... | 22.35 | 20.32 | 22.35 | 20.07 | 22.35 | 19.56 | 19.05 | 15.75 | 19.05 | 15.75 | 12.70 | 8.64 | 9.65 | 5.59 | 9.65 | 4.32 | 12.70 | 6.35 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... |
| 44.45 | ... | ... | ... | ... | 28.45 | 26.42 | 28.45 | 25.91 | 19.05 | 15.75 | 19.05 | 15.75 | 25.40 | 21.34 | 22.35 | 18.29 | 22.35 | 17.02 | 12.70 | 6.35 | 15.75 | 8.89 | 12.70 | 4.83 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... |
| 50.80 | ... | ... | ... | ... | ... | ... | 35.05 | 32.26 | 31.75 | 28.45 | 31.75 | 28.45 | 25.40 | 21.34 | 22.35 | 18.29 | 22.35 | 17.02 | 25.40 | 19.05 | 15.75 | 8.89 | 12.70 | 4.83 | 15.75 | 6.86 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... |
| 57.15 | ... | ... | ... | ... | ... | ... | ... | ... | 31.75 | 28.45 | 31.75 | 28.45 | 38.10 | 34.04 | 35.05 | 30.99 | 35.05 | 29.72 | 25.40 | 19.05 | 28.45 | 21.59 | 25.40 | 17.53 | 15.75 | 6.86 | 19.05 | 9.14 | ... | ... | ... | ... | ... | ... | ... | ... |
| 63.50 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 44.45 | 41.15 | 38.10 | 34.04 | 35.05 | 30.99 | 35.05 | 29.72 | 38.10 | 31.75 | 28.45 | 21.59 | 25.40 | 17.53 | 28.45 | 19.56 | 19.05 | 9.14 | 19.05 | 7.62 | ... | ... | ... | ... | ... | ... |
| 69.85 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 50.80 | 46.74 | 47.75 | 43.69 | 47.75 | 42.42 | 38.10 | 31.75 | 41.15 | 34.29 | 38.10 | 30.23 | 28.45 | 19.56 | 19.05 | 9.14 | 19.05 | 7.62 | ... | ... | ... | ... | ... | ... |
| 76.20 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 47.75 | 43.69 | 47.75 | 42.42 | 50.80 | 44.45 | 41.15 | 34.29 | 38.10 | 30.23 | 41.15 | 32.26 | 38.10 | 28.45 | 19.05 | 7.62 | 25.40 | 12.70 | ... | ... | ... | ... |
| 82.55 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 60.45 | 56.39 | 60.45 | 55.12 | 50.80 | 44.45 | 53.85 | 46.99 | 50.80 | 42.93 | 41.15 | 32.26 | 38.10 | 28.45 | 38.10 | 26.42 | 25.40 | 12.70 | 25.40 | 11.18 | ... | ... |
| 88.90 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 60.45 | 55.12 | 63.50 | 57.15 | 53.85 | 46.99 | 50.80 | 42.93 | 53.85 | 44.96 | 38.10 | 28.45 | 38.10 | 26.42 | 25.40 | 12.70 | 25.40 | 11.18 | 25.40 | 9.65 |
| 95.25 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 73.15 | 67.82 | 63.50 | 57.15 | 66.55 | 59.69 | 63.50 | 55.63 | 53.85 | 44.96 | 57.15 | 47.24 | 38.10 | 26.42 | 25.40 | 12.70 | 25.40 | 11.18 | 25.40 | 9.65 |
| 101.60 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 73.15 | 67.82 | 76.20 | 69.85 | 66.55 | 59.69 | 63.50 | 55.63 | 66.55 | 57.66 | 57.15 | 47.24 | 57.15 | 45.72 | 50.80 | 38.10 | 25.40 | 11.18 | 25.40 | 9.65 |
| 107.95 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 76.20 | 69.85 | 79.25 | 72.39 | 76.20 | 68.33 | 66.55 | 57.66 | 57.15 | 47.24 | 57.15 | 45.72 | 50.80 | 38.10 | 50.80 | 36.58 | 25.40 | 9.65 |
| 114.30 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 88.90 | 82.55 | 79.25 | 72.39 | 76.20 | 68.33 | 79.25 | 70.36 | 76.20 | 66.55 | 57.15 | 45.72 | 50.80 | 38.10 | 50.80 | 36.58 | 50.80 | 35.05 |
| 120.65 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 88.90 | 82.55 | 91.95 | 85.09 | 88.90 | 81.03 | 79.25 | 70.36 | 76.20 | 66.55 | 76.20 | 64.52 | 50.80 | 38.10 | 50.80 | 36.58 | 50.80 | 35.05 |
| 127.00 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 101.60 | 95.25 | 91.95 | 85.09 | 88.90 | 81.03 | 91.95 | 83.06 | 76.20 | 66.55 | 76.20 | 64.52 | 76.20 | 63.50 | 50.80 | 36.58 | 50.80 | 35.05 |
| 133.35 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 104.65 | 97.79 | 101.60 | 93.73 | 91.95 | 83.06 | 95.25 | 85.34 | 76.20 | 64.52 | 76.20 | 63.50 | 76.20 | 61.98 | 50.80 | 35.05 |
| 139.70 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 104.65 | 97.79 | 101.60 | 93.73 | 104.65 | 95.76 | 95.25 | 85.34 | 95.25 | 83.82 | 76.20 | 63.50 | 76.20 | 61.98 | 76.20 | 60.45 |
| 146.05 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 117.35 | 110.49 | 114.30 | 106.43 | 104.65 | 95.76 | 95.25 | 85.34 | 95.25 | 83.82 | 76.20 | 63.50 | 76.20 | 61.98 | 76.20 | 60.45 |
| 152.40 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 117.35 | 110.49 | 114.30 | 106.43 | 117.35 | 108.46 | 114.30 | 104.65 | 95.25 | 83.82 | 101.60 | 88.90 | 76.20 | 61.98 | 76.20 | 60.45 |
| 158.75 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 130.05 | 123.19 | 127.00 | 119.13 | 117.35 | 108.46 | 114.30 | 104.65 | 114.30 | 102.62 | 101.60 | 88.90 | 101.60 | 87.38 | 76.20 | 60.45 |
| 165.10 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 127.00 | 119.13 | 130.05 | 121.16 | 114.30 | 104.65 | 114.30 | 102.62 | 101.60 | 88.90 | 101.60 | 87.38 | 101.60 | 85.85 |
| 171.45 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 139.70 | 131.83 | 130.05 | 121.16 | 133.35 | 123.44 | 114.30 | 102.62 | 101.60 | 88.90 | 101.60 | 87.38 | 101.60 | 85.85 |
| 177.80 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 139.70 | 131.83 | 142.75 | 133.86 | 133.35 | 123.44 | 133.35 | 121.92 | 127.00 | 114.30 | 101.60 | 87.38 | 101.60 | 85.85 |
| 184.15 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 152.40 | 144.53 | 142.75 | 133.86 | 133.35 | 123.44 | 133.35 | 121.92 | 127.00 | 114.30 | 127.00 | 112.78 | 101.60 | 85.85 |
| 190.50 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 152.40 | 144.53 | 155.45 | 146.56 | 152.40 | 142.75 | 133.35 | 121.92 | 127.00 | 114.30 | 127.00 | 112.78 | 127.00 | 111.25 |
| 196.85 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 155.45 | 146.56 | 152.40 | 142.75 | 152.40 | 140.72 | 127.00 | 114.30 | 127.00 | 112.78 | 127.00 | 111.25 |
| 203.20 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 168.15 | 159.26 | 152.40 | 142.75 | 152.40 | 140.72 | 152.40 | 139.70 | 127.00 | 112.78 | 127.00 | 111.25 |
| 215.90 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 180.85 | 171.96 | 177.80 | 168.15 | 171.45 | 160.02 | 152.40 | 139.70 | 152.40 | 138.18 | 152.40 | 136.65 |
| 228.60 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 193.55 | 184.66 | 177.80 | 168.15 | 171.45 | 160.02 | 177.80 | 165.10 | 152.40 | 138.18 | 152.40 | 136.65 |
| 241.30 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 203.20 | 193.55 | 196.85 | 185.42 | 177.80 | 165.10 | 177.80 | 163.58 | 177.80 | 162.05 |
| 254.00 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 203.20 | 193.55 | 196.85 | 185.42 | 203.20 | 190.50 | 177.80 | 163.58 | 177.80 | 162.05 |
| 279.40 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 234.95 | 223.52 | 228.60 | 215.90 | 203.20 | 188.98 | 203.20 | 187.45 |
| 304.80 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 260.35 | 248.92 | 254.00 | 241.30 | 228.60 | 214.38 | 228.60 | 212.85 |
| 330.20 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 279.40 | 266.70 | 254.00 | 239.78 | 254.00 | 238.25 |
| 355.60 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 304.80 | 292.10 | 279.40 | 265.18 | 279.40 | 263.65 |
| 381.00 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 330.20 | 317.50 | 304.80 | 290.58 | 304.80 | 289.05 |
| 406.40 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 330.20 | 315.98 | 330.20 | 314.45 |
| 431.80 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 355.60 | 341.38 | 355.60 | 339.85 |
| 457.20 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 381.00 | 366.78 | 381.00 | 365.25 |
| 482.60 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 406.40 | 390.65 |
| 508.00 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 431.80 | 416.05 |
ASME B18.3 Hexagon Socket Head Cap Screw Dimensions (Inch)
| Nominal Size | Basic Screw Diameter | Body Diameter, D | Head Diameter, A | Head Height, H | Maximum Chamfer or Radius, C | Nominal Hexagon Socket Size, J | Minimum Key Engagement, T | Minimum Wall Thickness, G | Maximum Chamfer or Radius, K | Fillet Juncture Diameter, F | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Max. | Min. | Max. | Min. | Max. | Min. | Nom. | Dec. | Max. | Min. | ||||||
| #0 | 0.0600 | 0.0600 | 0.0568 | 0.096 | 0.091 | 0.060 | 0.057 | 0.004 | ... | 0.050 | 0.025 | 0.020 | 0.007 | 0.074 | 0.062 |
| #1 | 0.0730 | 0.0730 | 0.0695 | 0.118 | 0.112 | 0.073 | 0.070 | 0.005 | 1/16 | 0.062 | 0.031 | 0.025 | 0.007 | 0.087 | 0.075 |
| #2 | 0.0860 | 0.0860 | 0.0822 | 0.140 | 0.134 | 0.086 | 0.083 | 0.008 | 5/64 | 0.078 | 0.038 | 0.029 | 0.007 | 0.102 | 0.090 |
| #3 | 0.0990 | 0.0990 | 0.0949 | 0.161 | 0.154 | 0.099 | 0.095 | 0.008 | 5/64 | 0.078 | 0.044 | 0.034 | 0.007 | 0.115 | 0.102 |
| #4 | 0.1120 | 0.1120 | 0.1075 | 0.183 | 0.176 | 0.112 | 0.108 | 0.009 | 3/32 | 0.094 | 0.051 | 0.038 | 0.008 | 0.130 | 0.117 |
| #5 | 0.1250 | 0.1250 | 0.1202 | 0.205 | 0.198 | 0.125 | 0.121 | 0.012 | 3/32 | 0.094 | 0.057 | 0.043 | 0.008 | 0.145 | 0.132 |
| #6 | 0.1380 | 0.1380 | 0.1329 | 0.226 | 0.216 | 0.138 | 0.134 | 0.013 | 7/64 | 0.109 | 0.064 | 0.047 | 0.008 | 0.158 | 0.144 |
| #8 | 0.1640 | 0.1640 | 0.1585 | 0.270 | 0.257 | 0.164 | 0.159 | 0.014 | 9/64 | 0.141 | 0.077 | 0.056 | 0.008 | 0.188 | 0.172 |
| #10 | 0.1900 | 0.1900 | 0.1840 | 0.312 | 0.298 | 0.190 | 0.185 | 0.018 | 5/32 | 0.156 | 0.090 | 0.065 | 0.008 | 0.218 | 0.202 |
| #12 | 0.2160 | 0.2160 | 0.2095 | 0.324 | 0.314 | 0.216 | 0.210 | 0.022 | 5/32 | 0.156 | 0.103 | 0.082 | 0.010 | - | - |
| 1/4 | 0.2500 | 0.2500 | 0.2435 | 0.375 | 0.354 | 0.250 | 0.244 | 0.025 | 3/16 | 0.188 | 0.120 | 0.095 | 0.010 | 0.278 | 0.261 |
| 5/16 | 0.3125 | 0.3125 | 0.3053 | 0.469 | 0.446 | 0.312 | 0.306 | 0.033 | 1/4 | 0.250 | 0.151 | 0.119 | 0.010 | 0.347 | 0.329 |
| 3/8 | 0.3750 | 0.3750 | 0.3678 | 0.562 | 0.540 | 0.375 | 0.368 | 0.040 | 5/16 | 0.312 | 0.182 | 0.143 | 0.010 | 0.415 | 0.397 |
| 7/16 | 0.4375 | 0.4375 | 0.4294 | 0.656 | 0.631 | 0.438 | 0.430 | 0.047 | 3/8 | 0.375 | 0.213 | 0.166 | 0.015 | 0.484 | 0.465 |
| 1/2 | 0.5000 | 0.5000 | 0.4919 | 0.750 | 0.725 | 0.500 | 0.492 | 0.055 | 3/8 | 0.375 | 0.245 | 0.190 | 0.015 | 0.552 | 0.531 |
| 9/16 | 0.5625 | 0.5625 | 0.5538 | 0.843 | 0.827 | 0.562 | 0.554 | 0.062 | 7/16 | 0.437 | 0.276 | 0.214 | 0.015 | - | - |
| 5/8 | 0.6250 | 0.6250 | 0.6163 | 0.938 | 0.914 | 0.625 | 0.616 | 0.070 | 1/2 | 0.500 | 0.307 | 0.238 | 0.015 | 0.689 | 0.664 |
| 3/4 | 0.7500 | 0.7500 | 0.7406 | 1.125 | 1.094 | 0.750 | 0.740 | 0.085 | 5/8 | 0.625 | 0.370 | 0.285 | 0.015 | 0.828 | 0.800 |
| 7/8 | 0.8750 | 0.8750 | 0.8647 | 1.312 | 1.291 | 0.875 | 0.864 | 0.100 | 3/4 | 0.750 | 0.432 | 0.333 | 0.020 | 0.963 | 0.932 |
| 1 | 1.0000 | 1.0000 | 0.9886 | 1.500 | 1.476 | 1.000 | 0.988 | 0.114 | 3/4 | 0.750 | 0.495 | 0.380 | 0.020 | 1.100 | 1.068 |
| 1 1/8 | 1.1250 | 1.1250 | 1.1086 | 1.688 | 1.665 | 1.125 | 1.111 | 0.129 | 7/8 | 0.875 | 0.557 | 0.428 | 0.020 | 1.235 | 1.198 |
| 1 1/4 | 1.2500 | 1.2500 | 1.2336 | 1.875 | 1.852 | 1.250 | 1.236 | 0.144 | 7/8 | 0.875 | 0.620 | 0.475 | 0.020 | 1.370 | 1.333 |
| 1 3/8 | 1.3750 | 1.3750 | 1.3568 | 2.062 | 2.038 | 1.375 | 1.360 | 0.160 | 1 | 1.000 | 0.682 | 0.523 | 0.020 | 1.505 | 1.466 |
| 1 1/2 | 1.5000 | 1.5000 | 1.4818 | 2.250 | 2.224 | 1.500 | 1.485 | 0.176 | 1 | 1.000 | 0.745 | 0.570 | 0.020 | 1.640 | 1.601 |
| 1 3/4 | 1.7500 | 1.7500 | 1.7295 | 2.625 | 2.597 | 1.750 | 1.734 | 0.207 | 1 1/4 | 1.250 | 0.870 | 0.665 | 0.020 | 1.910 | 1.869 |
| 2 | 2.0000 | 2.0000 | 1.9780 | 3.000 | 2.970 | 2.000 | 1.983 | 0.238 | 1 1/2 | 1.500 | 0.995 | 0.760 | 0.020 | 2.180 | 2.128 |
| 2 1/4 | 2.2500 | 2.2500 | 2.2280 | 3.375 | 3.344 | 2.250 | 2.232 | 0.269 | 1 3/4 | 1.750 | 1.120 | 0.855 | 0.036 | 2.450 | 2.398 |
| 2 1/2 | 2.5000 | 2.5000 | 2.4762 | 3.750 | 3.717 | 2.500 | 2.481 | 0.300 | 1 3/4 | 1.750 | 1.245 | 0.950 | 0.036 | 2.720 | 2.662 |
| 2 3/4 | 2.7500 | 2.7500 | 2.7262 | 4.125 | 4.090 | 2.750 | 2.730 | 0.332 | 2 | 2.000 | 1.370 | 1.045 | 0.036 | 2.990 | 2.936 |
| 3 | 3.0000 | 3.0000 | 2.9762 | 4.500 | 4.464 | 3.000 | 2.979 | 0.362 | 2 1/4 | 2.250 | 1.495 | 1.140 | 0.036 | 3.260 | 3.206 |
| 3 1/4 | 3.2500 | 3.2500 | 3.2262 | 4.875 | 4.837 | 3.250 | 3.228 | 0.394 | 2 1/4 | 2.250 | 1.620 | 1.235 | 0.036 | 3.530 | 3.476 |
| 3 1/2 | 3.5000 | 3.5000 | 3.4762 | 5.250 | 5.211 | 3.500 | 3.478 | 0.426 | 2 3/4 | 2.750 | 1.745 | 1.330 | 0.036 | 3.800 | 3.746 |
| 3 3/4 | 3.7500 | 3.7500 | 3.7262 | 5.625 | 5.584 | 3.750 | 3.727 | 0.458 | 2 3/4 | 2.750 | 1.870 | 1.425 | 0.036 | 4.070 | 4.016 |
| 4 | 4.0000 | 4.0000 | 3.9762 | 6.000 | 5.958 | 4.000 | 3.976 | 0.489 | 3 | 3.000 | 1.995 | 1.520 | 0.036 | 4.340 | 4.286 |
ASME B18.3 Hexagon Socket Head Cap Screw Length Tolerances(Inch)
| Nominal Length | Nominal Size, Tolerances on Lengths | |||
|---|---|---|---|---|
| 0 Through 3/8, Incl. |
7/16 Through 3/4, Incl. |
7/8 Through 1 1/2, Incl. |
Over 1 1/2 | |
| Up to 1.00, incl. | -0.03 | -0.03 | -0.05 | ... |
| Over 1.00 to 2.50, incl. | -0.04 | -0.06 | -0.10 | -0.18 |
| Over 2.5 to 6.00, incl. | -0.06 | -0.08 | -0.14 | -0.20 |
| Over 6.00 | -0.12 | -0.12 | -0.20 | -0.24 |
ASME B18.3 Body and Grip Lengths for Socket Head Cap Screws(Inch)
| Nominal Size |
0 | 1 | 2 | 3 | 4 | 5 | 6 | 8 | 10 | 1/4 | 5/16 | 3/8 | 7/16 | 1/2 | 5/8 | 3/4 | 7/8 | 1 | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Nominal Length | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB |
| 0.75 | 0.25 | 0.19 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... |
| 0.88 | 0.25 | 0.19 | 0.25 | 0.17 | 0.25 | 0.16 | 0.25 | 0.15 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... |
| 1.00 | 0.50 | 0.44 | 0.25 | 0.17 | 0.25 | 0.16 | 0.25 | 0.15 | 0.25 | 0.12 | 0.25 | 0.12 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... |
| 1.25 | 0.75 | 0.69 | 0.62 | 0.55 | 0.62 | 0.54 | 0.62 | 0.52 | 0.25 | 0.12 | 0.25 | 0.12 | 0.50 | 0.34 | 0.38 | 0.22 | 0.38 | 0.17 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... |
| 1.50 | ... | ... | 0.88 | 0.80 | 0.88 | 0.79 | 0.88 | 0.77 | 0.75 | 0.62 | 0.75 | 0.62 | 0.50 | 0.34 | 0.38 | 0.22 | 0.38 | 0.17 | 0.50 | 0.25 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... |
| 1.75 | ... | ... | ... | ... | 1.12 | 1.04 | 1.12 | 1.02 | 0.75 | 0.62 | 0.75 | 0.62 | 1.00 | 0.84 | 0.88 | 0.72 | 0.88 | 0.67 | 0.50 | 0.25 | 0.62 | 0.35 | 0.50 | 0.19 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... |
| 2.00 | ... | ... | ... | ... | ... | ... | 1.38 | 1.27 | 1.25 | 1.12 | 1.25 | 1.12 | 1.00 | 0.84 | 0.88 | 0.72 | 0.88 | 0.67 | 1.00 | 0.75 | 0.62 | 0.35 | 0.50 | 0.19 | 0.62 | 0.27 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... |
| 2.25 | ... | ... | ... | ... | ... | ... | ... | ... | 1.25 | 1.12 | 1.25 | 1.12 | 1.50 | 1.34 | 1.38 | 1.22 | 1.38 | 1.17 | 1.00 | 0.75 | 1.12 | 0.85 | 1.00 | 0.69 | 0.62 | 0.27 | 0.75 | 0.36 | ... | ... | ... | ... | ... | ... | ... | ... |
| 2.50 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 1.75 | 1.62 | 1.50 | 1.34 | 1.38 | 1.22 | 1.38 | 1.17 | 1.50 | 1.25 | 1.12 | 0.85 | 1.00 | 0.69 | 1.12 | 0.77 | 0.75 | 0.36 | 0.75 | 0.30 | ... | ... | ... | ... | ... | ... |
| 2.75 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 2.00 | 1.84 | 1.88 | 1.72 | 1.88 | 1.67 | 1.50 | 1.25 | 1.62 | 1.35 | 1.50 | 1.19 | 1.12 | 0.77 | 0.75 | 0.36 | 0.75 | 0.30 | ... | ... | ... | ... | ... | ... |
| 3.00 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 1.88 | 1.72 | 1.88 | 1.67 | 2.00 | 1.75 | 1.62 | 1.35 | 1.50 | 1.19 | 1.62 | 1.27 | 1.50 | 1.12 | 0.75 | 0.30 | 1.00 | 0.50 | ... | ... | ... | ... |
| 3.25 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 2.38 | 2.22 | 2.38 | 2.17 | 2.00 | 1.75 | 2.12 | 1.85 | 2.00 | 1.69 | 1.62 | 1.27 | 1.50 | 1.12 | 1.50 | 1.04 | 1.00 | 0.50 | 1.00 | 0.44 | ... | ... |
| 3.50 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 2.38 | 2.17 | 2.50 | 2.25 | 2.12 | 1.85 | 2.00 | 1.69 | 2.12 | 1.77 | 1.50 | 1.12 | 1.50 | 1.04 | 1.00 | 0.50 | 1.00 | 0.44 | 1.00 | 0.38 |
| 3.75 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 2.88 | 2.67 | 2.50 | 2.25 | 2.62 | 2.35 | 2.50 | 2.19 | 2.12 | 1.77 | 2.25 | 1.86 | 1.50 | 1.04 | 1.00 | 0.50 | 1.00 | 0.44 | 1.00 | 0.38 |
| 4.00 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 2.88 | 2.67 | 3.00 | 2.75 | 2.62 | 2.35 | 2.50 | 2.19 | 2.62 | 2.27 | 2.25 | 1.86 | 2.25 | 1.80 | 2.00 | 1.50 | 1.00 | 0.44 | 1.00 | 0.38 |
| 4.25 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 3.00 | 2.75 | 3.12 | 2.85 | 3.00 | 2.69 | 2.62 | 2.27 | 2.25 | 1.86 | 2.25 | 1.80 | 2.00 | 1.50 | 2.00 | 1.44 | 1.00 | 0.38 |
| 4.50 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 3.50 | 3.25 | 3.12 | 2.85 | 3.00 | 2.69 | 3.12 | 2.77 | 3.00 | 2.62 | 2.25 | 1.80 | 2.00 | 1.50 | 2.00 | 1.44 | 2.00 | 1.38 |
| 4.75 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 3.50 | 3.25 | 3.62 | 3.35 | 3.50 | 3.19 | 3.12 | 2.77 | 3.00 | 2.62 | 3.00 | 2.54 | 2.00 | 1.50 | 2.00 | 1.44 | 2.00 | 1.38 |
| 5.00 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 4.00 | 3.75 | 3.62 | 3.35 | 3.50 | 3.19 | 3.62 | 3.27 | 3.00 | 2.62 | 3.00 | 2.54 | 3.00 | 2.50 | 2.00 | 1.44 | 2.00 | 1.38 |
| 5.25 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 4.12 | 3.85 | 4.00 | 3.69 | 3.62 | 3.27 | 3.75 | 3.36 | 3.00 | 2.54 | 3.00 | 2.50 | 3.00 | 2.44 | 2.00 | 1.38 |
| 5.50 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 4.12 | 3.85 | 4.00 | 3.69 | 4.12 | 3.77 | 3.75 | 3.36 | 3.75 | 3.30 | 3.00 | 2.50 | 3.00 | 2.44 | 3.00 | 2.38 |
| 5.75 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 4.62 | 4.35 | 4.50 | 4.19 | 4.12 | 3.77 | 3.75 | 3.36 | 3.75 | 3.30 | 3.00 | 2.50 | 3.00 | 2.44 | 3.00 | 2.38 |
| 6.00 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 4.62 | 4.35 | 4.50 | 4.19 | 4.62 | 4.27 | 4.50 | 4.12 | 3.75 | 3.30 | 4.00 | 3.50 | 3.00 | 2.44 | 3.00 | 2.38 |
| 6.25 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 5.12 | 4.85 | 5.00 | 4.69 | 4.62 | 4.27 | 4.50 | 4.12 | 4.50 | 4.04 | 4.00 | 3.50 | 4.00 | 3.44 | 3.00 | 2.38 |
| 6.50 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 5.00 | 4.69 | 5.12 | 4.77 | 4.50 | 4.12 | 4.50 | 4.04 | 4.00 | 3.50 | 4.00 | 3.44 | 4.00 | 3.38 |
| 6.75 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 5.50 | 5.19 | 5.12 | 4.77 | 5.25 | 4.86 | 4.50 | 4.04 | 4.00 | 3.50 | 4.00 | 3.44 | 4.00 | 3.38 |
| 7.00 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 5.50 | 5.19 | 5.62 | 5.27 | 5.25 | 4.86 | 5.25 | 4.80 | 5.00 | 4.50 | 4.00 | 3.44 | 4.00 | 3.38 |
| 7.25 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 6.00 | 5.69 | 5.62 | 5.27 | 5.25 | 4.86 | 5.25 | 4.80 | 5.00 | 4.50 | 5.00 | 4.44 | 4.00 | 3.38 |
| 7.50 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 6.00 | 5.69 | 6.12 | 5.77 | 6.00 | 5.62 | 5.25 | 4.80 | 5.00 | 4.50 | 5.00 | 4.44 | 5.00 | 4.38 |
| 7.75 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 6.12 | 5.77 | 6.00 | 5.62 | 6.00 | 5.54 | 5.00 | 4.50 | 5.00 | 4.44 | 5.00 | 4.38 |
| 8.00 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 6.62 | 6.27 | 6.00 | 5.62 | 6.00 | 5.54 | 6.00 | 5.50 | 5.00 | 4.44 | 5.00 | 4.38 |
| 8.50 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 7.12 | 6.77 | 7.00 | 6.62 | 6.75 | 6.30 | 6.00 | 5.50 | 6.00 | 5.44 | 6.00 | 5.38 |
| 9.00 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 7.62 | 7.27 | 7.00 | 6.62 | 6.75 | 6.30 | 7.00 | 6.50 | 6.00 | 5.44 | 6.00 | 5.38 |
| 9.50 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 8.00 | 7.62 | 7.75 | 7.30 | 7.00 | 6.50 | 7.00 | 6.44 | 7.00 | 6.38 |
| 10.00 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 8.00 | 7.62 | 7.75 | 7.30 | 8.00 | 7.50 | 7.00 | 6.44 | 7.00 | 6.38 |
| 11.00 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 9.25 | 8.80 | 9.00 | 8.50 | 8.00 | 7.44 | 8.00 | 7.38 |
| 12.00 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 10.25 | 9.80 | 10.00 | 9.50 | 9.00 | 8.44 | 9.00 | 8.38 |
| 13.00 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 11.00 | 10.50 | 10.00 | 9.44 | 10.00 | 9.38 |
| 14.00 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 12.00 | 11.50 | 11.00 | 10.44 | 11.00 | 10.38 |
| 15.00 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 13.00 | 12.50 | 12.00 | 11.44 | 12.00 | 11.38 |
| 16.00 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 13.00 | 12.44 | 13.00 | 12.38 |
| 17.00 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 14.00 | 13.44 | 14.00 | 13.38 |
| 18.00 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 15.00 | 14.44 | 15.00 | 14.38 |
| 19.00 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 16.00 | 15.38 |
| 20.00 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 17.00 | 16.38 |
ASME Material Specifications
ASTM
A193/A193M Bolting, Stud Bolts, Screws
ASTM
A320/A320M Bolting, Stud Bolts, Screws
ASTM A354
Bolts
ASTM
A449 Hex Cap Screws, Bolts, Studs
ASTM
A453/A453M Bolting, Stud Bolts, Screws, Nuts
ASTM
A574/A574M Standard Specification for Alloy Steel
Socket Head Cap Screws
ASTM
A1014/A1014M UNS N07718 Bolting, Stud Bolts, Screws, Nuts
ASTM
A1082/A1082M Bolting, Stud Bolts, Screws, Nuts
ASTM
F1554 Anchor Bolts, Anchor Rods
ASTM
F2882 Stud Bolts, Screws, Threaded Rod
ASTM
F3042 Socket Set, Square Head Slotted Headless Screw
ASTM
F3125/F3125M Heavy Hex Bolts, Screws, Studs
ASTM
F468/F468M Bolting, Stud Bolts, Screws
ASTM
F593 Bolting, Stud Bolts, Screws
ASTM
F738/F738M Stud Bolts, Screws
ASTM
F835/F835M Standard Specification for Alloy Steel Socket Button and Flat Countersunk
Head Cap Screws
ASTM
F837/F837M Standard Specification for Stainless Steel
Socket Head Cap Screws
ASTM
F880/F880M Standard Specification for Stainless Steel Socket Set Screws
ASTM
F901 Aluminium Transmission Tower Bolts
ASTM
F912/912M Standard Specification for Alloy Steel
Socket Set Screws