Hex Flange Nuts and Large Hex Flange Nuts

ASME B28.2.4.4 Dimensions of Hex Flange Nuts and Large Hex Flange 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		Diameter Flange, B		Nut Thickness, H		Maximum Wrenching Length,J	Maximum Flange Thickness ,K	Maximum Runout of Bearing Surface to Thread Axis,FIM
Nominal Size inch	Basic Major Diameter of Thread	Min.	Max	Min.	Max	Min	Max	Min	Max	Maximum Wrenching Length,J	Maximum Flange Thickness ,K	Maximum Runout of Bearing Surface to Thread Axis,FIM
Hex Flange Nuts
No.6	0.1380	0.302	0.312	0.342	0.361	0.406	0.422	0.156	0.171	0.10	0.02	0.014
8	0.1640	0.334	0.344	0.381	0.397	0.452	0.469	0.187	0.203	0.13	0.02	0.016
10	0.1900	0.365	0.375	0.416	0.433	0.480	0.5	0.203	0.219	0.13	0.03	0.017
12	0.2160	0.428	0.438	0.488	0.505	0.574	0.594	0.222	0.236	0.14	0.04	0.020
1/4	0.2500	0.428	0.438	0.488	0.505	0.574	0.594	0.222	0.236	0.14	0.04	0.020
5/16	0.3125	0.489	0.500	0.557	0.577	0.660	0.68	0.268	0.283	0.17	0.04	0.023
3/8	0.3750	0.551	0.562	0.628	0.650	0.728	0.75	0.330	0.347	0.23	0.04	0.025
7/16	0.4375	0.675	0.688	0.768	0.794	0.910	0.937	0.375	0.395	0.26	0.04	0.032
1/2	0.5000	0.736	0.750	0.840	0.866	1.000	1.031	0.437	0.458	0.31	0.05	0.035
9/16	0.5625	0.861	0.875	0.982	1.010	1.155	1.188	0.483	0.506	0.35	0.05	0.040
5/8	0.6250	0.922	0.938	1.051	1.083	1.248	1.281	0.545	0.569	0.40	0.05	0.044
3/4	0.7500	1.088	1.125	1.240	1.299	1.460	1.5	0.627	0.675	0.46	0.60	0.051
Large Hex Flange Nuts
1/4	0.2500	0.428	0.438	0.488	0.505	0.700	0.728	0.281	0.312	0.15	0.04	0.024
5/16	0.3125	0.489	0.500	0.557	0.577	0.790	0.82	0.343	0.375	0.20	0.04	0.028
3/8	0.3750	0.551	0.562	0.628	0.650	0.885	0.915	0.390	0.406	0.24	0.04	0.031
7/16	0.4375	0.675	0.688	0.768	0.794	1.100	1.131	0.437	0.468	0.26	0.04	0.038
1/2	0.5000	0.736	0.750	0.840	0.866	1.175	1.205	0.485	0.515	0.29	0.06	0.041
9/16	0.5625	0.861	0.875	0.982	1.010	1.260	1.3	0.546	0.578	0.37	0.06	0.044
5/8	0.6250	0.922	0.938	1.051	1.083	1.280	1.36	0.600	0.640	0.42	0.06	0.045