ASME B18.2.2 Hex Thick Slotted Nuts

Nominal Size or Basic Major Dia. of Thread		Width Across Flats F			Width Across Corners G		Thickness H			Unslotted Thickness T		Width of Slot S
Nominal Size or Basic Major Dia. of Thread		Basic	Max.	Min.	Max.	Min.	Basic	Max.	Min.	Max.	Min.	Max.	Min.
ASME B18.2.2 - 1⁄4	0.25	7⁄16	0.438	0.428	0.505	0.488	9⁄32	0.288	0.274	0.2	0.18	0.1	0.07
ASME B18.2.2 - 5⁄16	0.3125	1⁄2	0.5	0.489	0.577	0.557	21⁄64	0.336	0.32	0.24	0.22	0.12	0.09
ASME B18.2.2 - 3⁄8	0.375	9⁄16	0.562	0.551	0.65	0.628	13⁄32	0.415	0.398	0.29	0.27	0.15	0.12
ASME B18.2.2 - 7⁄16	0.4375	11⁄16	0.688	0.675	0.794	0.768	29⁄24	0.463	0.444	0.31	0.29	0.15	0.12
ASME B18.2.2 - 1⁄2	0.5	3⁄4	0.75	0.736	0.866	0.84	9⁄16	0.573	0.552	0.42	0.4	0.18	0.15
ASME B18.2.2 - 9⁄16	0.5625	7⁄8	0.875	0.861	1.01	0.982	39⁄64	0.621	0.598	0.43	0.41	0.18	0.15
ASME B18.2.2 - 5⁄8	0.625	15⁄16	0.938	0.922	1.083	1.051	23⁄32	0.731	0.706	0.51	0.49	0.24	0.18
ASME B18.2.2 - 3⁄4	0.75	11⁄8	1.125	1.088	1.299	1.24	13⁄16	0.827	0.798	0.57	0.55	0.24	0.18
ASME B18.2.2 - 7⁄8	0.875	15⁄16	1.312	1.269	1.516	1.447	29⁄32	0.922	0.89	0.67	0.64	0.24	0.18
ASME B18.2.2 - 1	1	11⁄2	1.5	1.45	1.732	1.653	1	1.018	0.982	0.73	0.7	0.3	0.24
ASME B18.2.2 - 11⁄8	1.125	111⁄16	1.688	1.631	1.949	1.859	15⁄32	1.176	1.136	0.83	0.8	0.33	0.24
ASME B18.2.2 - 11⁄4	1.25	17⁄8	1.875	1.812	2.165	2.066	11⁄4	1.272	1.228	0.89	0.86	0.4	0.31
ASME B18.2.2 - 13⁄8	1.375	21⁄16	2.062	1.994	2.382	2.273	13⁄8	1.399	1.351	1.02	0.98	0.4	0.31
ASME B18.2.2 - 11⁄2	1.5	21⁄4	2.25	2.175	2.598	2.48	11⁄2	1.526	1.474	1.08	1.04	0.46	0.37
All dimensions are in inches. Bold type indicates nuts unified dimensionally with British and Canadian Standards. Threads are Unified Coarse-, Fine-, or 8-thread series (UNC, UNF, or 8UN), Class 2B. Unification of fine-thread nuts is limited to sizes 1 inch and under.