asme-b18-2-3-7m-metric-heavy-hex-structural-bolts

Dimensions of Metric Heavy Hex Structural Bolts

Diameter, D, and Thread PitchBody Diameter DsWidth Across Flats, SWidth Across Corners, EHead Height, KWrenching Height, K1, MinWasher Face Diameter, Dw, MinWasher Face Thickness, CThread Length, B, BasicTransition Thread Length, Xo, Max
MaxMinMaxMinMaxMinMaxMinMaxMinLength ≤ 100Length > 100
M16 x 216.7015.3027.0026.1631.1829.5610.759.256.524.90.80.431386.0
M20 x 2.520.8419.1634.0033.0039.2637.2913.4011.608.131.40.80.436437.5
M22 x 2.522.8421.1636.0035.0041.5739.5514.9013.109.233.30.80.438457.5
M24 x 324.8423.1641.0040.0047.3445.2015.9014.109.938.00.80.441489.0
M27 x 327.8426.1646.0045.0053.1250.8517.9016.1011.342.80.80.444519.0
M30 x 3.530.8429.1650.0049.0057.7455.3719.7517.6512.446.50.80.4495610.5
M36 x 437.0035.0060.0058.8069.2866.4423.5521.4515.055.90.80.4566312.0
  • aBasic thread length, B, is a reference dimension.
  • bTransition 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 ANSIB18.2.3.7M-1979, R1995 standard.