Finished Hex Nuts

Grade 2, Grade 5, Grade 8 Dimensional specifications per ASME B18.2.2 APPLICATION Hex nuts (also referred to as finished hex nuts) are compatible with low carbon steel bolts such as ASTM A307, ASTM F1554 grade 36, SAE grade 2, and AASHTO M183. SAE grade 5 and grade 8 nuts are also available in a finished pattern. Since hot dip galvanizing typically adds 2.2 to 5 mils of thickness to the threaded portion of a fastener, galvanized hex nuts are tapped oversize to compensate for the corrosion resistant coating on the bolts.

Nominal Size	F			G		H
	Width Across Flats			Width Across Corners		Thickness
	Basic	Max	Min	Max	Min	Basic	Max	Min
1/4	7/16	0.438	0.428	0.505	0.488	7/32	0.226	.212
5/16	1/2	0.500	0.489	0.577	0.557	17/64	0.273	0.258
3/8	9/16	0.562	0.551	0.650	0.628	21/64	0.337	0.320
1/2	3/4	0.750	0.736	0.866	0.840	7/16	0.448	0.427
5/8	15/16	0.938	0.922	1.083	1.051	35/64	0.559	0.535
3/4	1-1/8	1.125	1.088	1.299	1.240	41/64	0.665	0.617
7/8	1-5/16	1.312	1.269	1.516	1.447	3/4	0.776	0.724
1	1-1/2	1.500	1.450	1.732	1.653	55/64	0.887	0.831
1-1/8	1-11/16	1.688	1.631	1.949	1.859	31/32	0.999	0.939
1-1/4	1-7/8	1.875	1.812	2.165	2.066	1-1/16	1.094	1.030
1-3/8	2-1/16	2.062	1.994	2.382	2.273	1-11/64	1.206	1.138
1-1/2	2-1/4	2.250	2.175	2.598	2.480	1-9/32	1.317	1.245
1-5/8	2-7/16	2.438	2.356	2.815	2.686	1-25/64	1.429	1.353
1-3/4	2-5/8	2.625	2.538	3.031	2.893	1-1/2	1.540	1.460
2	3	3.000	2.900	3.464	3.306	1-23/32	1.763	1.675
2-1/4	3-3/8	3.375	3.263	3.897	3.719	1-15/16	1.986	1.890
2-1/2	3-3/4	3.750	3.625	4.330	4.133	2-5/32	2.209	2.105
2-3/4	4-1/8	4.125	3.988	4.763	4.546	2-3/8	2.431	2.319
3	4-1/2	4.500	4.350	5.196	4.959	2-19/32	2.654	2.534

APPLICATION

Hex nuts (also referred to as finished hex nuts) are compatible with low carbon steel bolts such as ASTM A307, ASTM F1554 grade 36, SAE grade 2, and AASHTO M183.  SAE grade 5 and grade 8 nuts are also available in a finished pattern.  Since hot dip galvanizing typically adds 2.2 to 5 mils of thickness to the threaded portion of a fastener, galvanized hex nuts are tapped oversize to compensate for the corrosion resistant coating on the bolts.