Heavy Hex Bolt & Screw Distributor in India
  • Heavy Hex Bolt

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Heavy Hex Bolt

Product Detail
  • Product Code :
  • Heavy Hex Bolt
A hex head that is larger than a regular (finished) hex head is required by certain ASTM specifications. The A193, A320, and A307B specifications are among them. Although A325 and A490 bolts also require a heavy hex head, dimensional specifications for these bolts should be found under Structural Bolts, as they have shorter thread lengths than ordinary heavy hex bolts.

Product Dimensions



Bolt Diameter D F C H
Body Diameter Width Across Flats Width Across Corners Height
Max Basic Max Min Max Min Basic Max Min
12 0.515 34 0.750 0.725 0.866 0.826 1132 0.364 0.302
58 0.642 1516 0.938 0.906 1.083 1.033 2764 0.444 0.378
34 0.768 118 1.125 1.088 1.299 1.240 12 0.524 0.455
78 0.895 1516 1.312 1.269 1.516 1.447 3764 0.604 0.531
1 1.022 112 1.500 1.450 1.732 1.653 4364 0.700 0.591
118 1.149 11116 1.688 1.631 1.949 1.859 34 0.780 0.658
114 1.277 178 1.875 1.812 2.165 2.066 2732 0.876 0.749
138 1.404 2116 2.062 1.994 2.382 2.273 2932 0.940 0.810
112 1.531 214 2.250 2.175 2.598 2.480 1 1.036 0.902
158 1.658 2716 2.438 2.356 2.815 2.616 1332 1.116 0.978
134 1.785 2-5/8 2.625 2.538 3.031 2.893 1532 1.196 1.054
178 1.912 21316 2.812 2.719 3.248 3.099 114 1.276 1.130
2 2.039 3 3.000 2.900 3.464 3.306 11132 1.388 1.175
214 2.305 338 3.375 3.262 3.897 3.719 112 1.548 1.327
212 2.559 334 3.750 3.625 4.330 4.133 12132 1.708 1.479
Dimensions per ASME B18.2.1

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