ASME B18.2.2 dimensions — Hex nuts and hex jam nuts, inch series (Table 1.1.1-5 profile)

Name: ASME B18.2.2 dimensions
Creator: TaurusFix

Edition: dimensions from the 2015 edition · current edition ASME B18.2.2-2022
Related: ASME B1.1-2024ASTM A563ASTM F594

Hex Jam Nut ASME B18.2.2In stock · 9 sizesView product

ASME B18.2.2 dimensions

in · 28 sizes, 1/4-20 UNC – 1-1/2-12 UNFIn stock

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Size	TPIThreads per inch	FWidth across flats		HNut height			GWidth across corners		Basic major diameter	Thread series	Thread class	H₁Jam nut thickness
Size		min	max		min	max	min	max				min	max
1/4-20 UNC	20	0.428	0.438	0.226	0.212	0.226	0.488	0.505	0.25	UNC	2B	0.15	0.163
1/4-28 UNF	28	0.428	0.438	0.226	0.212	0.226	0.488	0.505	0.25	UNF	2B	0.15	0.163
5/16-18 UNC	18	0.489	0.5	0.273	0.258	0.273	0.557	0.577	0.3125	UNC	2B	0.18	0.195
5/16-24 UNF	24	0.489	0.5	0.273	0.258	0.273	0.557	0.577	0.3125	UNF	2B	0.18	0.195
3/8-16 UNC	16	0.551	0.563	0.337	0.32	0.337	0.628	0.65	0.375	UNC	2B	0.21	0.227
3/8-24 UNF	24	0.551	0.563	0.337	0.32	0.337	0.628	0.65	0.375	UNF	2B	0.21	0.227
7/16-14 UNC	14	0.675	0.688	0.385	0.365	0.385	0.768	0.794	0.4375	UNC	2B	0.24	0.26
7/16-20 UNF	20	0.675	0.688	0.385	0.365	0.385	0.768	0.794	0.4375	UNF	2B	0.24	0.26
1/2-13 UNC	13	0.736	0.75	0.448	0.427	0.448	0.84	0.866	0.5	UNC	2B	0.302	0.323
1/2-20 UNF	20	0.736	0.75	0.448	0.427	0.448	0.84	0.866	0.5	UNF	2B	0.302	0.323
9/16-12 UNC	12	0.861	0.875	0.496	0.473	0.496	0.982	1.01	0.5625	UNC	2B	0.301	0.324
9/16-18 UNF	18	0.861	0.875	0.496	0.473	0.496	0.982	1.01	0.5625	UNF	2B	0.301	0.324
5/8-11 UNC	11	0.922	0.938	0.559	0.535	0.559	1.051	1.083	0.625	UNC	2B	0.363	0.387
5/8-18 UNF	18	0.922	0.938	0.559	0.535	0.559	1.051	1.083	0.625	UNF	2B	0.363	0.387
3/4-10 UNC	10	1.088	1.125	0.665	0.617	0.665	1.24	1.299	0.75	UNC	2B	0.398	0.446
3/4-16 UNF	16	1.088	1.125	0.665	0.617	0.665	1.24	1.299	0.75	UNF	2B	0.398	0.446
7/8-9 UNC	9	1.269	1.312	0.776	0.724	0.776	1.447	1.516	0.875	UNC	2B	0.458	0.51
7/8-14 UNF	14	1.269	1.312	0.776	0.724	0.776	1.447	1.516	0.875	UNF	2B	0.458	0.51
1-8 UNC	8	1.45	1.5	0.887	0.831	0.887	1.653	1.732	1	UNC	2B	0.519	0.575
1-12 UNF	12	1.45	1.5	0.887	0.831	0.887	1.653	1.732	1	UNF	2B	0.519	0.575
1-1/8-7 UNC	7	1.631	1.688	0.999	0.939	0.999	1.859	1.949	1.125	UNC	2B	0.579	0.639
1-1/8-12 UNF	12	1.631	1.688	0.999	0.939	0.999	1.859	1.949	1.125	UNF	2B	0.579	0.639
1-1/4-7 UNC	7	1.812	1.875	1.094	1.03	1.094	2.066	2.165	1.25	UNC	2B	0.687	0.751
1-1/4-12 UNF	12	1.812	1.875	1.094	1.03	1.094	2.066	2.165	1.25	UNF	2B	0.687	0.751
1-3/8-6 UNC	6	1.994	2.062	1.206	1.138	1.206	2.273	2.382	1.375	UNC	2B	0.747	0.815
1-3/8-12 UNF	12	1.994	2.062	1.206	1.138	1.206	2.273	2.382	1.375	UNF	2B	0.747	0.815
1-1/2-6 UNC	6	2.175	2.25	1.317	1.245	1.317	2.48	2.598	1.5	UNC	2B	0.808	0.88
1-1/2-12 UNF	12	2.175	2.25	1.317	1.245	1.317	2.48	2.598	1.5	UNF	2B	0.808	0.88

Dimensions from ASME B18.2.2:2015. The current edition is ASME B18.2.2-2022.

ASME B18.2.2 sizes

1/4-20 UNC1 5/16-18 UNC1 3/8-16 UNC1 7/16-14 UNC1 1/2-13 UNC1 5/8-11 UNC1 3/4-10 UNC1 7/8-9 UNC1 1-8 UNC1 All 9 sizes in this family →