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Hex Bolts

ASME B 18.2.1 - 2010

Display drawing:

Screw Thread 1/4 5/16 3/8 7/16 1/2 5/8 3/4 7/8 1 1-1/8 1-1/4 1-3/8 1-1/2 1-5/8 1-3/4 1-7/8 2 2-1/4 2-1/2 2-3/4 3 3-1/4 3-1/2 3-3/4 4
D 0.25 0.3125 0.375 0.4375 0.5 0.625 0.75 0.875 1 1.125 1.25 1.375 1.5 1.625 1.75 1.875 2 2.25 2.5 2.75 3 3.25 3.5 3.75 4
P 20 18 16 14 13 11 10 9 8 7 7 6 6 12 5 12 4.5 4.5 4 4 4 4 4 4 4
Ds Max 0.26 0.324 0.388 0.452 0.515 0.642 0.768 0.895 1.022 1.149 1.277 1.404 1.531 1.658 1.785 1.912 2.039 2.305 2.559 2.827 3.081 3.335 3.589 3.858 4.111
Ds Min 0.237 0.298 0.36 0.421 0.482 0.605 0.729 0.852 0.976 1.098 1.223 1.345 1.47 1.591 1.716 1.839 1.964 2.214 2.461 2.711 2.961 3.21 3.461 3.726 3.975
S Nominal 7/16 1/2 9/16 5/8 3/4 15/16 1-1/8 1-5/16 1-1/2 1-11/16 1-7/8 2-1/16 2-1/4 2-7/16 2-5/8 2-13/16 3 3-3/8 3-3/4 4-1/8 4-1/2 4-7/8 5-1/4 5-5/8 6
S Max 0.438 0.5 0.562 0.625 0.75 0.938 1.125 1.312 1.5 1.688 1.875 2.062 2.25 2.438 2.625 2.812 3 3.375 3.75 4.125 4.5 4.875 5.25 5.625 6
S Min 0.425 0.484 0.544 0.603 0.725 0.906 1.088 1.269 1.45 1.631 1.812 1.994 2.175 2.356 2.538 2.719 2.9 3.262 3.625 3.988 4.35 4.712 5.075 5.437 5.8
E Max 0.505 0.577 0.650 0.722 0.866 1.083 1.299 1.516 1.732 1.949 2.165 2.382 2.598 2.815 3.031 3.248 3.464 3.897 4.330 4.763 5.196 5.629 6.062 6.495 6.928
E Min 0.484 0.552 0.620 0.687 0.826 1.033 1.240 1.447 1.653 1.859 2.066 2.273 2.480 2.616 2.893 3.099 3.306 3.719 4.133 4.546 4.959 5.372 5.786 6.198 6.612
K Nominal 11/64 7/32 1/4 19/64 11/32 27/64 1/2 37/64 43/64 3/4 27/32 29/32 1 1-3/32 1-5/32 1-1/4 1-11/32 1-1/2 1-21/32 1-13/16 2 2-3/16 2-5/16 2-1/2 2-11/16
K Max 0.188 0.235 0.268 0.316 0.364 0.444 0.524 0.604 0.7 0.78 0.876 0.94 1.036 1.116 1.196 1.276 1.388 1.548 1.708 1.869 2.06 2.251 2.38 2.572 2.764
K Min 0.15 0.195 0.226 0.272 0.302 0.378 0.455 0.531 0.591 0.658 0.749 0.81 0.902 0.978 1.054 1.13 1.175 1.327 1.479 1.632 1.815 1.936 2.057 2.241 2.424
R Max 0.030 0.030 0.030 0.030 0.030 0.060 0.060 0.060 0.090 0.090 0.090 0.090 0.090 0.090 0.120 0.120 0.120 0.190 0.190 0.190 0.190 0.190 0.190 0.190 0.190
R Min 0.010 0.010 0.010 0.010 0.010 0.020 0.020 0.020 0.030 0.030 0.030 0.030 0.030 0.030 0.040 0.040 0.040 0.060 0.060 0.060 0.060 0.060 0.060 0.060 0.060
B L≤6 0.75 0.875 1 1.125 1.25 1.5 1.75 2 2.25 2.5 2.75 3 3.25 3.5 3.75 4 4.25 4.75 5.25 5.75 6.25 6.75 7.25 7.75 8.25
B L＞6 1 1.125 1.25 1.375 1.5 1.75 2 2.25 2.5 2.75 3 3.25 3.5 3.75 4 4.25 4.5 5 5.5 6 6.5 7 7.5 8 8.5