ASME B18.2.3.7M Heavy Hex Structural Bolts

ASME B18.2.3.7M Heavy Hex Structural Bolts

                                                                 
Dia. D, and Thread Pitch Body Diameter, Ds Width Across Flats, S Width Across Corners, E Head Height, K Wrenching Height, K1 Washer Face Dia., Dw Washer Face Thickness, C Thread Length, B a Transition Thread Length, Xb
Thread Thread
Max Min Max Min Max Min Max Min Min Min Max Min Basic Max
ANSI B18.2.3.7M - M16 × 2 16.7 15.3 27 26.16 31.18 29.56 10.75 9.25 6.5 24.9 0.8 0.4 31 38 6
ANSI B18.2.3.7M - M20 × 2.5 20.84 19.16 34 33 39.26 37.29 13.4 11.6 8.1 31.4 0.8 0.4 36 43 7.5
ANSI B18.2.3.7M - M22 × 2.5 22.84 21.16 36 35 41.57 39.55 14.9 13.1 9.2 33.3 0.8 0.4 38 45 7.5
ANSI B18.2.3.7M - M24 × 3 24.84 23.16 41 40 47.34 45.2 15.9 14.1 9.9 38 0.8 0.4 41 48 9
ANSI B18.2.3.7M - M27 × 3 27.84 26.16 46 45 53.12 50.85 17.9 16.1 11.3 42.8 0.8 0.4 44 51 9
ANSI B18.2.3.7M - M30 × 3.5 30.84 29.16 50 49 57.74 55.37 19.75 17.65 12.4 46.5 0.8 0.4 49 56 10.5
ANSI B18.2.3.7M - M36 × 4 37 35 60 58.8 69.28 66.44 23.55 21.45 15 55.9 0.8 0.4 56 63 12
  • a Basic thread length, B, is a reference dimension.
  • b Transition thread length, X, includes the length of incomplete threads and tolerances on grip gaging
  • length and body length. It is intended for calculation purposes.
  • All dimensions are in millimeters.
  • For additional manufacturing and acceptance specifications, reference should be made to the
  • ANSI B18.2.3.7M-1979 (R1995) standard.