Dimensions for Carriage Bolts

Bolt Diameter	Body Diameter --D--	Head Diameter --A--	Head Height --H--	Across Square --O--	Square Depth --S--
1/4	.237 - .260	.563 - .594	.125 - .145	.245 - .260	.125 - .156
5/16	.298 - .324	.688 - .719	.156 - .176	.307 - .324	.156 - .187
3/8	.360 - .388	.782 - .844	.188 - .208	.368 - .388	.188 - .219
7/16	.421 - .452	.907 - .969	.219 - .239	.431 - .452	.219 - .250
1/2	.483 - .515	1.032 - 1.094	.250 - .270	.492 - .515	.250 - .281
5/8	.605 - .642	1.219 - 1.344	.313 - .344	.616 - .642	.313 - .344
3/4	.729 - .768	1.469 - 1.594	.375 - .406	.741 - .768	.375 - .406