Hex Slotted Nuts

All dimensions are in mm unless mentioned otherwise

Nominal Size inch	Basic Major Diameter of Thread	Widtf Across Flats, F			Width Across Corners, G		Thickness , H			Unslotted Thickness, T		Width of Slot, S		Maximum Runout of Bearing Surface to Thread Axis, FIM
Nominal Size inch	Basic Major Diameter of Thread	Basic inch	Min.	Max	Min.	Max.	Basic inch	Min.	Max	Min.	Max	Min.	Max	Maximum Runout of Bearing Surface to Thread Axis, FIM
1/4	0.2500	7/16	0.428	0.438	0.488	0.505	7/32	0.212	0.226	0.12	0.140	0.07	0.10	0.015
5/16	0.3125	1/2	0.489	0.500	0.557	0.577	17/64	0.258	0.273	0.16	0.180	0.09	0.12	0.016
3/8	0.3750	9/16	0.551	0.562	0.628	0.650	21/64	0.320	0.337	0.19	0.210	0.12	0.15	0.018
7/16	0.4375	11/16	0.675	0.688	0.768	0.794	3/8	0.365	0.385	0.21	0.230	0.12	0.15	0.018
1/2	0.5000	3/4	0.736	0.750	0,.84	0.866	7/16	0.427	0.448	0.27	0.290	0.15	0.18	0.019
9/16	0.5625	7/8	0.861	0.875	0.982	1.010	31/64	0.473	0.496	0.29	0.310	0.15	0.18	0.020
5/8	0.6250	15/16	0.922	0.938	1.051	1.083	35/64	0.535	0.559	0.32	0.340	0.18	0.24	0.021
3/4	0.7500	1 1/8	1.088	1.125	1.240	1.299	41/64	0.617	0.665	0.38	0.400	0.18	0.24	0.023
7/8	0.8750	1 5/16	1.269	1.312	1.447	1.516	3/4	0.724	0.776	0.49	0.520	0.18	0.24	0.025
1	1.0000	1 1/2	1.450	1.500	1.653	1.732	55/64	0.831	0.887	0.56	0.590	0.24	0.30	0.027
1 1/8	1.1250	1 11/16	1.631	1.688	1.859	1.949	31/32	0.939	0.999	0.61	0.640	0.24	0.33	0.030
1 1/4	1.2500	1 7/8	1.812	1.875	2.066	2.165	1 1/16	1.030	1.094	0.67	0.700	0.31	0.40	0.033
1 3/8	1.3750	2 1/16	1.994	2.062	2.273	2.382	1 11/64	1.138	1.206	0.78	0.820	0.31	0.40	0.036
1 1/2	1.5000	2 1/4	2.175	2.250	2.480	2.598	1 9/32	1.245	1.317	0.82	0.860	0.37	0.46	0.039