ASME B 18.2.2 Heavy Hex Nuts and Heavy Hex Jam Nuts

Screw Thread	P	P	P	s	s	e	e	m	m	m1	m1
	UNC	UNF	8-UN	min	max	min	max	min	max	min	max
1/4	20	28	-	0.488	0.500	0.556	0.577	0.218	0.250	0.156	0.188
5/16	18	24	-	0.546	0.562	0.622	0.650	0.280	0.314	0.186	0.220
3/8	16	24	-	0.669	0.688	0.763	0.794	0.341	0.377	0.216	0.252
7/16	14	20	-	0.728	0.750	0.830	0.866	0.403	0.411	0.247	0.285
1/2	13	20	-	0.850	0.875	0.969	1.010	0.464	0.504	0.277	0.317
9/16	12	18	-	0.909	0.938	1.037	1.083	0.526	0.568	0.307	0.349
5/8	11	18	-	1.031	1.062	1.175	1.227	0.587	0.631	0.337	0.381
3/4	10	16	-	1.212	1.250	1.382	1.443	0.710	0.758	0.398	0.446
7/8	9	14	-	1.394	1.438	1.589	1.660	0.833	0.885	0.458	0.510
1	8	12	-	1.575	1.625	1.796	1.876	0.956	1.012	0.519	0.575
1-1/8	7	12	8	1.756	1.812	2.002	2.093	1.079	1.139	0.579	0.639
1-1/4	7	12	8	1.938	2.000	2.209	2.309	1.187	1.251	0.687	0.751
1-3/8	6	12	8	2.119	2.188	2.416	2.526	1.310	1.378	0.747	0.815
1-1/2	6	12	8	2.300	2.375	2.622	2.742	1.433	1.505	0.808	0.880
1-5/8	-	-	8	2.481	2.562	2.828	2.959	1.556	1.632	0.868	0.944
1-3/4	5	-	8	2.662	2.750	3.035	3.175	1.679	1.759	0.929	1.009
1-7/8	-	-	8	2.844	2.938	3.242	3.392	1.802	1.886	0.989	1.073
2	4-1/2	-	8	3.025	3.125	3.449	3.608	1.925	2.013	1.050	1.138
2-1/4	4-1/2	-	8	3.388	3.500	3.862	4.041	2.155	2.251	1.155	1.251
2-1/2	4	-	8	3.750	3.875	4.275	4.474	2.401	2.505	1.401	1.505
2-3/4	4	-	8	4.112	4.250	4.688	4.907	2.647	2.759	1.522	1.634
3	4	-	8	4.475	4.625	5.102	5.340	2.893	3.013	1.643	1.763
3-1/4	4	-	8	4.838	5.000	5.515	5.774	3.124	3.252	1.748	1.876
3-1/2	4	-	8	5.200	5.375	5.928	6.207	3.370	3.506	1.870	2.006
3-3/4	4	-	8	5.562	5.750	6.341	6.640	3.616	3.760	1.990	2.134
4	4	-	8	5.925	6.125	6.755	7.073	3.862	4.014	2.112	2.264

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