HEX FLANGE NUT DIMENSIONS TABLE

Hex flange nut dimensions sizes table according to ASME B18.2.2. All dimensions are given in inches.

Hex Flange Nut Dimensions
Nominal
 Size		 Basic
Major
Diameter
of
Thread 		 F G B H J K
Width
Across
Flats		 Width
Across
Corners		 Dia.
Flange		 Thickness
Hex
Nut		 Wrenching
Length		 Flange
Thickness
min max. min. max. min. max. min. max. min. min.
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
8 0.1640 0.334 0.344 0.381 0.397 0.452 0.469 0.187 0.203 0.13 0.02
10 0.1900 0.365 0.375 0.416 0.433 0.480 0.500 0.203 0.219 0.13 0.03
12 0.2160 0.428 0.438 0.488 0.505 0.574 0.594 0.222 0.236 0.14 0.04
1/4 0.2500 0.428 0.438 0.488 0.505 0.574 0.594 0.222 0.236 0.14 0.04
5/16 0.3125 0.489 0.500 0.557 0.577 0.660 0.680 0.268 0.283 0.17 0.04
3/8 0.3750 0.551 0.562 0.628 0.650 0.728 0.750 0.330 0.347 0.23 0.04
7/16 0.4375 0.675 0.688 0.768 0.794 0.910 0.937 0.375 0.395 0.26 0.04
1/2 0.5000 0.736 0.750 0.840 0.866 1.000 1.031 0.437 0.458 0.31 0.05
9/16 0.5625 0.861 0.875 0.982 1.010 1.155 1.188 0.483 0.506 0.35 0.05
5/8 0.6250 0.922 0.938 1.051 1.083 1.248 1.281 0.545 0.569 0.40 0.05
3/4 0.7500 1.088 1.125 1.240 1.299 1.460 1.500 0.627 0.675 0.46 0.06
Large Hex Flange Nuts
Nominal
 Size		 Basic
Major
Diameter
of
Thread 		 F G B H J K
Width
Across
Flats		 Width
Across
Corners		 Dia.
Flange		 Thickness
Hex
Nut		 Wrenching
Length		 Flange
Thickness
min max. min. max. min. max. min. max. min. min.
1/4 0.2500 0.428 0.438 0.488 0.505 0.700 0.728 0.281 0.312 0.15 0.04
5/16 0.3125 0.489 0.500 0.557 0.577 0.790 0.820 0.343 0.375 0.20 0.04
3/8 0.3750 0.551 0.562 0.628 0.650 0.885 0.915 0.390 0.406 0.24 0.04
7/16 0.4375 0.675 0.688 0.768 0.794 1.100 1.131 0.437 0.468 0.26 0.04
1/2 0.5000 0.736 0.750 0.840 0.866 1.175 1.205 0.485 0.515 0.29 0.06
9/16 0.5625 0.861 0.875 0.982 1.010 1.260 1.300 0.546 0.578 0.37 0.06
5/8 0.6250 0.922 0.938 1.051 1.083 1.280 1.360 0.600 0.640 0.42 0.06

Supplements:

Reference:

  • ASME B18.2.2-2010, Square and Hex Nuts (Inch Series)