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Nuts

Serrated Flange Nuts

Dimensions of Serrated Flange Locknuts

Nominal Size or
Basic Major Diameter
of Thread		 F G B H J K Perpendicularity
of Bearing
Surface
Width Across Flats Width Across Corners Flange Diameter Nut Thickness Hex Height Flange Thickness
Max Min Max Min Max Min Max Min Min Min Max
#6 (0.1380) 0.312 0.302 0.361 0.342 0.422 0.408 0.171 0.156 0.10 0.02 0.014
#8 (0.1640) 0.344 0.334 0.397 0.381 0.469 0.452 0.203 0.187 0.13 0.02 0.016
#10 (0.1900) 0.375 0.365 0.433 0.416 0.500 0.480 0.219 0.203 0.13 0.03 0.017
#12 (0.2160) 0.438 0.428 0.505 0.488 0.594 0.574 0.236 0.222 0.14 0.04 0.020
1/4 (0.2500) 0.438 0.428 0.505 0.488 0.594 0.574 0.236 0.222 0.14 0.04 0.020
5/16 (0.3125) 0.500 0.489 0.577 0.557 0.680 0.660 0.283 0.268 0.17 0.04 0.023
3/8 (0.3750) 0.562 0.551 0.650 0.628 0.750 0.728 0.347 0.330 0.23 0.04 0.025
7/16 (0.4375) 0.688 0.675 0.794 0.768 0.937 0.910 0.395 0.375 0.26 0.04 0.032
1/2 (0.5000) 0.750 0.736 0.866 0.840 1.031 1.000 0.458 0.437 0.31 0.05 0.035
9/16 (0.5625) 0.875 0.861 1.010 0.982 1.188 1.155 0.506 0.483 0.35 0.05 0.040
5/8 (0.6250) 0.938 0.922 1.083 1.051 1.281 1.248 0.569 0.545 0.40 0.05 0.044
3/4 (0.7500) 1.125 1.088 1.299 1.240 1.500 1.460 0.675 0.627 0.46 0.06 0.051