ASME/ANSI B18.2.2 Hexagon Coupling Nuts

ASME/ANSI B18.2.2 Hexagon Coupling Nut
Across Flats Overall Height Countersink
Diameter		 Bearing Diameter Viewing Hole
d s h da dw v dv
Nom Nom Max Min Nom Max Min Nom Max Min Nom Max Min Dia Max Dia Min
#6 0.138 5/16 0.312 0.302 1/2 0.510 0.470 0.168 0.312 0.296 1/4 0.255 0.235 0.055 0.028
#8 0.164 5/16 0.312 0.302 5/8 0.645 0.595 0.194 0.312 0.296 1/3 0.323 0.298 0.066 0.033
#10 0.190 5/16 0.312 0.302 3/4 0.760 0.711 0.220 0.312 0.296 3/8 0.380 0.356 0.076 0.038
1/4 0.250 7/16 0.438 0.428 1.3/4 1.760 1.690 0.280 0.438 0.416 7/8 0.880 0.845 0.100 0.050
5/16 0.312 1/2 0.500 0.489 1.3/4 1.760 1.690 0.342 0.500 0.475 7/8 0.880 0.845 0.125 0.062
3/8 0.375 9/16 0.562 0.551 1.3/4 1.760 1.690 0.405 0.562 0.534 7/8 0.880 0.845 0.150 0.075
7/16 0.437 5/8 0.625 0.607 1.3/4 1.760 1.690 0.472 0.625 0.594 7/8 0.880 0.845 0.175 0.087
1/2 0.500 11/16 0.688 0.663 1.3/4 1.760 1.690 0.540 0.688 0.654 7/8 0.880 0.845 0.200 0.100
9/16 0.562 13/16 0.813 0.782 2.1/8 2.135 2.067 0.607 0.813 0.772 1 1.068 1.034 0.225 0.112
5/8 0.625 13/16 0.813 0.782 2.1/8 2.135 2.067 0.675 0.813 0.772 1 1.068 1.034 0.250 0.125
3/4 0.750 1 1.000 0.963 2.1/4 2.260 2.190 0.810 1.000 0.950 1 1/8 1.130 1.095 0.300 0.150
7/8 0.875 1.1/4 1.250 1.212 2.1/2 2.510 2.440 0.945 1.250 1.188 1 1/4 1.255 1.220 0.350 0.175
1 1.000 1.3/8 1.375 1.325 2.3/4 2.760 2.690 1.080 1.375 1.306 1 3/8 1.380 1.345 0.400 0.200
1.1/8 1.125 1.1/2 1.500 1.450 3 3.010 2.940 1.215 1.500 1.425 1 1/2 1.505 1.470 0.450 0.225
1.1/4 1.250 1.5/8 1.625 1.575 3 3.010 2.940 1.350 1.625 1.544 1 1/2 1.505 1.470 0.500 0.250
1.1/2 1.500 2 2.000 1.950 3.1/2 3.510 3.440 1.620 2.000 1.900 1 3/4 1.755 1.720 0.600 0.300
1.5/8 1.625 2.9/16 2.562 2.481 4.7/8 4.910 4.830 1.755 2.562 2.434 2 1/2 2.455 2.415 0.650 0.325
1.3/4 1.750 2.3/4 2.750 2.662 5.1/4 5.290 5.210 1.890 2.750 2.613 2 2/3 2.645 2.605 0.700 0.350
1.7/8 1.875 2 15/16 2.938 2.884 5.5/8 5.670 5.580 2.025 2.938 2.791 2 5/6 2.835 2.790 0.750 0.375
2 2.000 3.1/8 3.125 3.025 6 6.040 5.950 2.160 3.125 2.969 3 3.020 2.975 0.800 0.400
2.1/4 2.250 3.1/2 3.500 3.388 6.3/4 6.800 6.700 2.430 3.500 3.325 3 2/5 3.400 3.350 0.900 0.450
2.1/2 2.500 3.7/8 3.875 3.750 7.1/2 7.550 7.440 2.700 3.875 3.681 3 7/9 3.775 3.720 1.000 0.500
2.3/4 2.750 4.1/4 4.250 4.112 8.1/4 8.310 8.190 2.970 4.250 4.038 4 1/6 4.155 4.095 1.000 1.000