ASME B18.21.1 External Tooth Lock Washers
ASME B18.21.1 External Tooth Lock Washers Dimensions (mm)
| Nominal Size | Inside Diameter, A | Outside Diameter, B | Thickness, C | |||
|---|---|---|---|---|---|---|
| Max. | Min. | Max. | Min. | Max. | Min. | |
| ASME B18.21.1 #3 (0.099) | 2.769 | 2.591 | 5.969 | 5.588 | 0.406 | 0.254 |
| ASME B18.21.1 #4 (0.112) | 3.124 | 2.921 | 6.604 | 6.223 | 0.457 | 0.305 |
| ASME B18.21.1 #5 (0.125) | 3.454 | 3.277 | 7.239 | 6.858 | 0.508 | 0.356 |
| ASME B18.21.1 #6 (0.138) | 3.810 | 3.581 | 8.128 | 7.747 | 0.559 | 0.406 |
| ASME B18.21.1 #8 (0.164) | 4.470 | 4.267 | 9.677 | 9.271 | 0.584 | 0.457 |
| ASME B18.21.1 #10 (0.190) | 5.182 | 4.953 | 10.414 | 10.033 | 0.610 | 0.457 |
| ASME B18.21.1 #12 (0.216) | 5.867 | 5.613 | 12.065 | 11.684 | 0.686 | 0.508 |
| ASME B18.21.1 1⁄4 (0.250) | 6.782 | 6.502 | 12.954 | 12.548 | 0.711 | 0.584 |
| ASME B18.21.1 5⁄16 (0.3125) | 8.433 | 8.128 | 15.494 | 14.935 | 0.864 | 0.711 |
| ASME B18.21.1 3⁄8 (0.375) | 10.109 | 9.754 | 17.628 | 17.018 | 1.016 | 0.813 |
| ASME B18.21.1 7⁄16 (0.4375) | 11.786 | 11.379 | 19.304 | 18.796 | 1.016 | 0.813 |
| ASME B18.21.1 1⁄2 (0.500) | 13.462 | 13.030 | 22.860 | 22.352 | 1.143 | 0.940 |
| ASME B18.21.1 9⁄16 (0.5625) | 15.138 | 14.630 | 25.019 | 24.384 | 1.143 | 0.940 |
| ASME B18.21.1 5⁄8 (0.625) | 16.840 | 16.281 | 27.178 | 26.543 | 1.270 | 1.067 |
| ASME B18.21.1 11⁄16 (0.6875) | 18.491 | 17.882 | 29.337 | 28.702 | 1.270 | 1.067 |
| ASME B18.21.1 3⁄4 (0.750) | 20.193 | 19.507 | 32.004 | 30.988 | 1.397 | 1.194 |
| ASME B18.21.1 13⁄16 (0.8125) | 21.869 | 21.158 | 33.401 | 32.766 | 1.397 | 1.194 |
| ASME B18.21.1 7⁄8 (0.875) | 23.546 | 22.784 | 35.814 | 35.052 | 1.524 | 1.321 |
| ASME B18.21.1 1 (1.000) | 26.924 | 26.035 | 41.148 | 40.386 | 1.702 | 1.499 |
ASME B18.21.1 External Tooth Lock Washers Dimensions (Inch)
| Nominal Size | Inside Diameter, A | Outside Diameter, B | Thickness, C | |||
|---|---|---|---|---|---|---|
| Max. | Min. | Max. | Min. | Max. | Min. | |
| ASME B18.21.1 #3 (0.099) | 2.769 | 2.591 | 5.969 | 5.588 | 0.406 | 0.254 |
| ASME B18.21.1 #4 (0.112) | 3.124 | 2.921 | 6.604 | 6.223 | 0.457 | 0.305 |
| ASME B18.21.1 #5 (0.125) | 3.454 | 3.277 | 7.239 | 6.858 | 0.508 | 0.356 |
| ASME B18.21.1 #6 (0.138) | 3.810 | 3.581 | 8.128 | 7.747 | 0.559 | 0.406 |
| ASME B18.21.1 #8 (0.164) | 4.470 | 4.267 | 9.677 | 9.271 | 0.584 | 0.457 |
| ASME B18.21.1 #10 (0.190) | 5.182 | 4.953 | 10.414 | 10.033 | 0.610 | 0.457 |
| ASME B18.21.1 #12 (0.216) | 5.867 | 5.613 | 12.065 | 11.684 | 0.686 | 0.508 |
| ASME B18.21.1 1⁄4 (0.250) | 6.782 | 6.502 | 12.954 | 12.548 | 0.711 | 0.584 |
| ASME B18.21.1 5⁄16 (0.3125) | 8.433 | 8.128 | 15.494 | 14.935 | 0.864 | 0.711 |
| ASME B18.21.1 3⁄8 (0.375) | 10.109 | 9.754 | 17.628 | 17.018 | 1.016 | 0.813 |
| ASME B18.21.1 7⁄16 (0.4375) | 11.786 | 11.379 | 19.304 | 18.796 | 1.016 | 0.813 |
| ASME B18.21.1 1⁄2 (0.500) | 13.462 | 13.030 | 22.860 | 22.352 | 1.143 | 0.940 |
| ASME B18.21.1 9⁄16 (0.5625) | 15.138 | 14.630 | 25.019 | 24.384 | 1.143 | 0.940 |
| ASME B18.21.1 5⁄8 (0.625) | 16.840 | 16.281 | 27.178 | 26.543 | 1.270 | 1.067 |
| ASME B18.21.1 11⁄16 (0.6875) | 18.491 | 17.882 | 29.337 | 28.702 | 1.270 | 1.067 |
| ASME B18.21.1 3⁄4 (0.750) | 20.193 | 19.507 | 32.004 | 30.988 | 1.397 | 1.194 |
| ASME B18.21.1 13⁄16 (0.8125) | 21.869 | 21.158 | 33.401 | 32.766 | 1.397 | 1.194 |
| ASME B18.21.1 7⁄8 (0.875) | 23.546 | 22.784 | 35.814 | 35.052 | 1.524 | 1.321 |
| ASME B18.21.1 1 (1.000) | 26.924 | 26.035 | 41.148 | 40.386 | 1.702 | 1.499 |