ASME B18.2.2 Hex Flange Nuts

Nominal Size	Basic Major Diameter of Thread	Width Across Flats, F		Width Across Corners, G		Diameter Flange, B		Nut Thickness, H		Minimum Wrenching Length, J	Minimum Flange Thickness, K	Maximum Runout of Bearing Surface to Thread Axis, FIM
Nominal Size	Basic Major Diameter of Thread	Min.	Max.	Min.	Max.	Min.	Max.	Min.	Max.	Minimum Wrenching Length, J	Minimum Flange Thickness, K	Maximum Runout of Bearing Surface to Thread Axis, FIM
ASME B18.2.2 - No. 6	0.138	0.302	0.312	0.342	0.361	0.406	0.422	0.156	0.171	0.1	0.02	0.014
ASME B18.2.2 - 8	0.164	0.334	0.344	0.381	0.397	0.452	0.469	0.187	0.203	0.13	0.02	0.016
ASME B18.2.2 - 10	0.19	0.365	0.375	0.416	0.433	0.48	0.5	0.203	0.219	0.13	0.03	0.017
ASME B18.2.2 - 12	0.216	0.428	0.438	0.488	0.505	0.574	0.594	0.222	0.236	0.14	0.04	0.02
ASME B18.2.2 - 1⁄4	0.25	0.428	0.438	0.488	0.505	0.574	0.594	0.222	0.236	0.14	0.04	0.02
ASME B18.2.2 - 5⁄16	0.3125	0.489	0.5	0.557	0.577	0.66	0.68	0.268	0.283	0.17	0.04	0.023
ASME B18.2.2 - 3⁄8	0.375	0.551	0.562	0.628	0.65	0.728	0.75	0.33	0.347	0.23	0.04	0.025
ASME B18.2.2 - 7⁄16	0.4375	0.675	0.688	0.768	0.794	0.91	0.937	0.375	0.395	0.26	0.04	0.032
ASME B18.2.2 - 1⁄2	0.5	0.736	0.75	0.84	0.866	1	1.031	0.437	0.458	0.31	0.05	0.035
ASME B18.2.2 - 9⁄16	0.5625	0.861	0.875	0.982	1.01	1.155	1.188	0.483	0.506	0.35	0.05	0.04
ASME B18.2.2 - 5⁄8	0.625	0.922	0.938	1.051	1.083	1.248	1.281	0.545	0.569	0.4	0.05	0.044
ASME B18.2.2 - 3⁄4	0.75	1.088	1.125	1.24	1.299	1.46	1.5	0.627	0.675	0.46	0.06	0.051
GENERAL NOTES: (a) For additional requirements refer to section 3, General Data. (b) Concentricity of Tapped Hole. Axis of tapped hole shall be concentric with axis of nut body within a tolerance equal to 3% (6% FIM) of the maximum width across flats.