SAE J482a Hex High and Hex Slotted Nuts

Nominal Size^a	Width Across Flats, F			Width Across Corners, G		Slot Width,S		Thickness, H			Unslotted Thickness,T		Counterbore (Optional)
Nominal Size^a	Basic	Max.	Min.	Max.	Min.	Min.	Max.	Basic	Max.	Min.	Max.	Min.	Dia., A	Depth, D
SAE J482a 1⁄4 0.25	7⁄16	0.4375	0.428	0.505	0.488	0.07	0.1	3⁄8	0.382	0.368	0.29	0.27	0.266	0.062
SAE J482a 5⁄16 0.3125	1⁄2	0.5	0.489	0.577	0.557	0.09	0.12	29⁄64	0.461	0.445	0.37	0.35	0.328	0.078
SAE J482a 3⁄8 0.375	9⁄16	0.5625	0.551	0.65	0.628	0.12	0.15	1⁄2	0.509	0.491	0.38	0.36	0.391	0.094
SAE J482a 7⁄16 0.4375	11⁄16	0.6875	0.675	0.794	0.768	0.12	0.15	39⁄64	0.619	0.599	0.46	0.44	0.453	0.109
SAE J482a 1⁄2 0.5	3⁄4	0.75	0.736	0.866	0.84	0.15	0.18	21⁄32	0.667	0.645	0.51	0.49	0.516	0.125
SAE J482a 9⁄16 0.5625	7⁄8	0.875	0.861	1.01	0.982	0.15	0.18	49⁄64	0.778	0.754	0.59	0.57	0.594	0.141
SAE J482a 5⁄8 0.625	15⁄16	0.9375	0.922	1.083	1.051	0.18	0.24	27⁄32	0.857	0.831	0.63	0.61	0.656	0.156
SAE J482a 3⁄4 0.75	11⁄8	1.125	1.088	1.299	1.24	0.18	0.24	1	1.015	0.985	0.76	0.73	0.781	0.188
SAE J482a 7⁄8 0.875	15⁄16	1.3125	1.269	1.516	1.447	0.18	0.24	15⁄32	1.172	1.14	0.92	0.89	0.906	0.219
SAE J482a 1 1	11⁄2	1.5	1.45	1.732	1.653	0.24	0.3	15⁄16	1.33	1.292	1.05	1.01	1.031	0.25
SAE J482a 11⁄8 1.125	1 11⁄16	1.6875	1.631	1.949	1.859	0.24	0.33	11⁄2	1.52	1.48	1.18	1.14	1.156	0.281
SAE J482a 11⁄4 1.25	17⁄8	1.875	1.812	2.165	2.066	0.31	0.4	1 11⁄16	1.71	1.666	1.34	1.29	1.281	0.312
a When specifying a nominal size in decimals, any zero in the fourth decimal place is omitted. Reprinted with permission. Copyright © 1990, Society of Automotive Engineers, Inc. All rights reserved All dimensions are in inches. Threads are Unified Standard Class 2B, UNC or UNF Series.