Dimensions of Heavy Hex Slotted Nuts

Nominal Size	Basic Major Diameter of Thread	Width Across Flats, F			Width Across Corners, G		Thickness, H			Unslotted Thickness, T		Width of Slot, S		Maximum Runout of Bearing Surface to Thread Axis, FLM
		Basic	Min.	Max.	Min.	Max.	Basic	Min.	Max.	Min.	Max.	Min.	Max.
1/4	0.2500	1/2	0.488	0.500	0.556	0.577	15/64	0.218	0.250	0.13	0.15	0.07	0.10	0.017
5/16	0.3125	9/16	0.546	0.562	0.622	0.650	19/64	0.280	0.314	0.19	0.21	0.09	0.12	0.020
3/8	0.3750	11/16	0.669	0.688	0.763	0.794	23/64	0.341	0.377	0.22	0.24	0.12	0.15	0.021
7/16	0.4375	3/4	0.728	0.750	0.830	0.866	27/64	0.403	0.441	0.26	0.28	0.12	0.15	0.022
1/2	0.5000	7/8	0.850	0.875	0.969	1.010	31/64	0.464	0.504	0.32	0.34	0.15	0.18	0.023
9/16	0.5625	15/16	0.909	0.938	1.037	1.083	35/64	0.526	0.568	0.35	0.37	0.15	0.18	0.024
5/8	0.6250	1 1/16	1.031	1.062	1.175	1.227	39/64	0.587	0.631	0.38	0.40	0.18	.024	0.025
3/4	0.7500	1 1/4	1.212	1.250	1.382	1.443	47/64	0.710	0.758	0.47	0.49	0.18	0.24	0.027
7/8	0.8750	1 7/16	1.394	1.438	1.589	1.660	55/64	0.833	0.885	0.59	0.62	0.18	0.24	0.029
1	1.0000	1 5/8	1.575	1.625	1.796	1.876	63/64	0.956	1.012	0.69	0.72	0.24	0.30	0.031
1 1/8	1.1250	1 13/16	1.756	1.812	2.002	2.093	1 7/64	1.079	1.139	0.75	0.78	0.24	0.30	0.033
1 1/4	1.2500	2	1.938	2.000	2.209	2.309	1 7/32	1.187	1.251	0.83	0.86	0.31	0.40	0.035
1 3/8	1.3750	2 3/16	2.119	2.188	2.416	2.526	1 11/32	1.310	1.378	0.95	0.99	0.31	0.40	0.038
1 1/2	1.5000	2 3/8	2.300	2.375	2.622	2.742	1 15/32	1.433	1.505	1.01	1.05	0.37	0.46	0.041
1 3/4	1.7500	2 3/4	2.662	2.750	3.035	3.175	1 23/32	1.679	1.759	1.20	1.24	0.43	0.52	0.048
2	2.0000	3 1/8	3.025	3.125	3.449	3.608	1 31/32	1.925	2.013	1.38	1.43	0.43	0.52	0.055
2 1/4	2.2500	3 1/2	3.388	3.500	3.862	4.041	2 13/64	2.155	2.251	1.62	1.67	0.43	0.52	0.061
2 1/2	2.5000	3 7/8	3.750	3.875	4.275	4.474	2 29/64	2.401	2.505	1.74	1.79	0.55	0.64	0.068
2 3/4	2.7500	4 1/4	4.112	4.250	4.688	4.907	2 45/64	2.647	2.759	1.99	2.05	0.55	0.64	0.074
3	3.0000	4 5/8	4.475	4.625	5.102	5.340	2 61/64	2.893	3.013	2.17	2.23	0.62	0.71	0.081
3 1/4	3.2500	5	4.838	5.000	5.515	5.774	3 3/16	3.124	3.252	2.41	2.47	0.62	0.71	0.087
3 1/2	3.5000	5 3/8	5.200	5.375	5.928	6.207	3 7/16	3.370	3.506	2.65	2.72	0.62	0.71	0.094
3 3/4	3.7500	5 3/4	5.562	5.750	6.341	6.640	3 11/16	3.616	3.760	2.90	2.97	0.62	0.71	0.100
4	4.0000	6 1/8	5.925	6.125	6.755	7.073	3 15/16	3.862	4.014	3.15	3.22	0.62	0.71	0.107