Hex Bolts

Hex bolts (six sided heads) are the industry standard for fasteners with forged heads. ASTM A307 grade A bolts, all SAE hex bolts, and several other common specifications require a standard (finished) hex head. For specifications such as A307 grade B, A325 and A490 that require a heavy hex pattern, refer to dimensional tolerances for heavy hex bolts or structural bolts.

MANUFACTURING

Portland Bolt manufactures hex bolts from 1/2" diameter through 2-1/2” diameter in most ASTM, AASHTO, and SAE specifications. Special tooling can be created to produce nonstandard head dimensions or bolt heads with your company’s name and/or logo.

STOCK

Diameters: 1/2 - 1”
Grade: ASTM A307
Lengths: 30” maximum
Origin: Domestic and import
Finish: Black and hot dip galvanized

STANDARD THREAD LENGTH

Bolt lengths ≤ 6”: Thread length = (2 X diameter) + 1/4”
Bolt lengths > 6”: Thread length = (2 X diameter) + 1/2”
Note: Most stock hex bolts longer than 12” in length will have 6” of thread.

Bolt Diameter	D	F			C		H
	Body Diameter	Width Across Flats			Width Across Corners		Height
	Max	Basic	Max	Min	Max	Min	Basic	Max	Min
3/8	0.388	9/16	0.562	0.544	0.650	0.620	1/4	0.268	0.226
1/2	0.515	3/4	0.750	0.725	0.866	0.826	11/32	0.364	0.302
5/8	0.642	15/16	0.938	0.906	1.083	1.033	27/64	0.444	0.378
3/4	0.768	1-1/8	1.125	1.088	1.299	1.240	1/2	0.524	0.455
7/8	0.895	1-5/16	1.312	1.269	1.516	1.447	37/64	0.604	0.531
1	1.022	1-1/2	1.500	1.450	1.732	1.653	43/64	0.700	0.591
1-1/8	1.149	1-11/16	1.688	1.631	1.949	1.859	3/4	0.780	0.658
1-1/4	1.277	1-7/8	1.875	1.812	2.165	2.066	27/32	0.876	0.749
1-3/8	1.404	2-1/16	2.062	1.994	2.382	2.273	29/32	0.940	0.810
1-1/2	1.531	2-1/4	2.250	2.175	2.598	2.480	1	1.036	0.902
1-3/4	1.785	2-5/8	2.625	2.538	3.031	2.893	1-5/32	1.196	1.054
2	2.039	3	3.000	2.900	3.464	3.306	1-11/32	1.388	1.175
2-1/4	2.305	3-3/8	3.375	3.262	3.897	3.719	1-1/2	1.548	1.327
2-1/2	2.559	3-3/4	3.750	3.625	4.330	4.133	1-21/32	1.708	1.479

Dimensions per ASME B18.2.1 1996