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ASME B18.2.2 Square and Hex Machine Screw Nuts

ASME B18.2.2 Square and Hex Machine Screw Nuts

ASME B18.2.2 Square and Hex Machine Screw Nuts Dimensions (mm)

Nominal Size Basic Major Diameter of Thread Width Across Flats, F Width Across Corners Thickness Bearing Surface Runout to Thread Axis, FIM
Basic Min. Max. Square, G Hex, G1 Min. Max.
Min. Max. Min. Max.
0 1.524 3.969 3.810 3.962 5.232 5.613 4.343 4.572 1.092 1.270 0.127
1 1.854 3.969 3.810 3.962 5.232 5.613 4.343 4.572 1.092 1.270 0.127
2 2.184 4.763 4.572 4.775 6.274 6.731 5.207 5.512 1.448 1.676 0.152
3 2.515 4.763 4.572 4.775 6.274 6.731 5.207 5.512 1.448 1.676 0.152
4 2.845 6.350 6.121 6.350 8.407 8.992 6.985 7.341 2.210 2.489 0.229
5 3.175 7.938 7.671 7.925 10.541 11.227 8.738 9.169 2.591 2.896 0.279
6 3.505 7.938 7.671 7.925 10.541 11.227 8.738 9.169 2.591 2.896 0.279
8 4.166 8.731 8.433 8.738 11.582 12.344 9.601 10.084 2.972 3.302 0.305
10 4.826 9.525 9.195 9.525 12.624 13.462 10.490 10.998 2.972 3.302 0.330
12 5.486 11.113 10.744 11.125 14.757 15.723 12.243 12.827 3.759 4.089 0.381
1⁄4 6.350 11.113 10.744 11.125 14.757 15.723 12.243 12.827 4.521 4.902 0.381
5⁄16 7.925 14.288 13.843 14.275 18.999 20.193 15.773 16.510 5.283 5.715 0.508
3⁄8 9.525 15.875 15.418 15.875 21.158 22.454 17.577 18.339 6.071 6.528 0.533

ASME B18.2.2 Square and Hex Machine Screw Nuts Dimensions (Inch)

Nominal Size Basic Major Diameter of Thread Width Across Flats, F Width Across Corners Thickness Bearing Surface Runout to Thread Axis, FIM
Basic Min. Max. Square, G Hex, G1 Min. Max.
Min. Max. Min. Max.
0 0.060 5⁄32 0.150 0.156 0.206 0.221 0.171 0.180 0.043 0.050 0.005
1 0.073 5⁄32 0.150 0.156 0.206 0.221 0.171 0.180 0.043 0.050 0.005
2 0.086 3⁄16 0.180 0.188 0.247 0.265 0.205 0.217 0.057 0.066 0.006
3 0.099 3⁄16 0.180 0.188 0.247 0.265 0.205 0.217 0.057 0.066 0.006
4 0.112 1⁄4 0.241 0.250 0.331 0.354 0.275 0.289 0.087 0.098 0.009
5 0.125 5⁄16 0.302 0.312 0.415 0.442 0.344 0.361 0.102 0.114 0.011
6 0.138 5⁄16 0.302 0.312 0.415 0.442 0.344 0.361 0.102 0.114 0.011
8 0.164 11⁄32 0.332 0.344 0.456 0.486 0.378 0.397 0.117 0.130 0.012
10 0.190 3⁄8 0.362 0.375 0.497 0.53 0.413 0.433 0.117 0.130 0.013
12 0.216 7⁄16 0.423 0.438 0.581 0.619 0.482 0.505 0.148 0.161 0.015
1⁄4 0.250 7⁄16 0.423 0.438 0.581 0.619 0.482 0.505 0.178 0.193 0.015
5⁄16 0.312 9⁄16 0.545 0.562 0.748 0.795 0.621 0.65 0.208 0.225 0.020
3⁄8 0.375 5⁄8 0.607 0.625 0.833 0.884 0.692 0.722 0.239 0.257 0.021