Bolts

Hex Bolts

Size	Body	Width Across Flats	Width Across Corners	Head Height	Thread Length
1/4	.245 – .250	.428 – .438	.488 – .505	.150 – .163	.750
5/16	.3065 – .3125	.489 – .500	.557 – .577	.195 – .211	.875
3/8	.369 – .375	.551 – .562	.628 – .650	.226 – .243	1.00
7/16	.4305 – .4375	.612 – .625	.698 – .722	.272 – .291	1.125
1/2	.439 – .500	.736 – .750	.840 – .866	.302 – .323	1.25
9/16	.5545 – .5625	.798 – .812	.910 – .938	.348 – .371	1.375
5/8	.617 – .625	.922 – .938	1.051 – 1.083	.378 – .403	1.50
3/4	.741 – .750	1.100 – 1.125	1.254 – 1.299	.455 – .483	1.75
7/8	.866 – .875	1.285 – 1.312	1.465 – 1.516	.531 – .563	2.00
1″	.990 – 1.00	1.469 – 1.500	1.675 – 1.732	.591 – .627	2.25
1-1/4	1.239 – 1.250	1.812 – 1.875	2.066 – 2.165	.749 – .813	2.75
1-1/2	1.488 – 1.500	2.175 – 2.250	2.480 – 2.598	.902 – .974	3.25

Carriage Bolts

Carriage Bolts

	D	A	H	O	S
Bolt Diameter	Body Diameter	Head Diameter	Head Height	Across Square	Square Depth
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