Hex Tap Bolts

Nominal or Basic Product Diameter F G H
Width Across Flats Width Across Corners Head Height
Basic Max. Min. Max. Min. Basic Max. Min.
1/4 7/16 0.438 0.428 0.505 0.488 5/32 0.163 0.150
5/16 1/2 0.500 0.489 0.577 0.557 13/64 0.211 0.195
3/8 9/16 0.562 0.551 0.650 0.628 15/64 0.243 0.226
7/16 5/8 0.625 0.612 0.722 0.698 9/32 0.291 0.272
1/2 3/4 0.750 0.736 0.866 0.840 5/16 0.323 0.302
9/16 13/16 0.812 0.798 0.938 0.910 23/64 0.371 0.348
5/8 15/16 0.938 0.922 1.083 1.051 25/64 0.403 0.378
3/4 1 1/8 1.125 1.100 1.299 1.254 15/32 0.483 0.455
7/8 1 5/16 1.312 1.269 1.516 1.447 37/64 0.604 0.531
1 1 1/2 1.500 1.450 1.732 1.653 43/64 0.700 0.591
1 1/4 1 7/8 1.875 1.812 2.165 2.066 27/32 0.876 0.749