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ASME B18.2.2 Hex Jam Nuts

ASME B18.2.2 Hex Jam Nuts

ASME B18.2.2 Hex Jam Nuts Dimensions (mm)

Nominal Size Basic Major Diameter of Thread Width Across Flats, F Width Across Corners, G Thickness, H1 Runout
Min Max Min Max Min Max Max
1/4 6.350 10.871 11.125 12.395 12.827 3.810 4.140 0.381
5/16 7.938 12.421 12.700 14.148 14.656 4.572 4.953 0.406
3/8 9.525 13.995 14.300 15.951 16.510 5.334 5.766 0.432
7/16 11.113 17.145 17.475 19.507 20.168 6.096 6.604 0.457
1/2 12.700 18.694 19.050 21.336 21.996 7.671 8.204 0.483
9/16 14.288 21.869 22.225 24.943 25.654 7.645 8.230 0.508
5/8 15.875 23.419 23.825 26.695 27.508 9.220 9.830 0.533
3/4 19.050 27.635 28.575 31.496 32.995 10.109 11.328 0.584
7/8 22.225 32.233 33.325 36.754 38.506 11.633 12.954 0.635
1 25.400 36.830 38.100 41.986 43.993 13.183 14.605 0.686
1 1/8 28.575 41.427 42.875 47.219 49.505 14.707 16.231 0.762
1 1/4 31.750 46.025 47.625 52.476 54.991 17.450 19.075 0.838
1 3/8 34.925 50.648 52.375 57.734 60.503 18.974 20.701 0.914
1 1/2 38.100 55.245 57.150 62.992 65.989 20.523 22.352 0.991
1 5/8 41.275 59.690 61.722 68.047 71.247 22.047 23.978 1.118
1 3/4 44.450 64.465 66.675 73.482 76.987 23.597 25.629 1.219
1 7/8 47.625 69.139 71.450 78.816 82.474 25.121 27.254 1.295
2 50.800 73.660 76.200 83.972 87.986 26.670 28.905 1.397
2 1/4 57.150 82.880 85.725 94.463 98.984 29.337 32.182 1.549
2 1/2 63.500 92.075 95.250 104.978 109.982 35.585 36.246 1.727
2 3/4 69.850 101.295 104.775 115.468 120.980 38.659 39.522 1.880
3 76.200 110.490 114.300 125.959 131.978 41.732 42.799 2.057
3 1/4 82.550 119.710 123.825 136.474 142.977 44.399 46.076 2.210
3 1/2 88.900 128.905 133.350 146.964 153.975 47.498 49.352 2.388
3 3/4 95.250 138.125 142.875 157.455 164.973 50.546 52.629 2.540
4 101.600 147.320 152.400 167.945 175.971 53.645 55.905 2.718

ASME B18.2.2 Hex Jam Nuts Dimensions (Inch)

Nominal Size Basic Major Diameter of Thread Width Across Flats, F Width Across Corners, G Thickness, H1 Runout
Min Max Min Max Min Max Max
1/4 0.2500 0.428 0.438 0.488 0.505 0.150 0.163 0.015
5/16 0.3125 0.489 0.500 0.557 0.577 0.180 0.195 0.016
3/8 0.3750 0.551 0.563 0.628 0.650 0.210 0.227 0.017
7/16 0.4375 0.675 0.688 0.768 0.794 0.240 0.260 0.018
1/2 0.5000 0.736 0.750 0.840 0.866 0.302 0.323 0.019
9/16 0.5625 0.861 0.875 0.982 1.010 0.301 0.324 0.020
5/8 0.6250 0.922 0.938 1.051 1.083 0.363 0.387 0.021
3/4 0.7500 1.088 1.125 1.240 1.299 0.398 0.446 0.023
7/8 0.8750 1.269 1.312 1.447 1.516 0.458 0.510 0.025
1 1.0000 1.450 1.500 1.653 1.732 0.519 0.575 0.027
1 1/8 1.1250 1.631 1.688 1.859 1.949 0.579 0.639 0.030
1 1/4 1.2500 1.812 1.875 2.066 2.165 0.687 0.751 0.033
1 3/8 1.3750 1.994 2.062 2.273 2.382 0.747 0.815 0.036
1 1/2 1.5000 2.175 2.250 2.480 2.598 0.808 0.880 0.039
1 5/8 1.6250 2.35 2.43 2.679 2.805 0.868 0.944 0.044
1 3/4 1.7500 2.538 2.625 2.893 3.031 0.929 1.009 0.048
1 7/8 1.8750 2.722 2.813 3.103 3.247 0.989 1.073 0.051
2 2.0000 2.900 3.000 3.306 3.464 1.050 1.138 0.055
2 1/4 2.2500 3.263 3.375 3.719 3.897 1.155 1.267 0.061
2 1/2 2.5000 3.625 3.750 4.133 4.330 1.401 1.427 0.068
2 3/4 2.7500 3.988 4.125 4.546 4.763 1.522 1.556 0.074
3 3.0000 4.350 4.500 4.959 5.196 1.643 1.685 0.081
3 1/4 3.2500 4.713 4.875 5.373 5.629 1.748 1.814 0.087
3 1/2 3.5000 5.075 5.250 5.786 6.062 1.870 1.943 0.094
3 3/4 3.7500 5.438 5.625 6.199 6.495 1.990 2.072 0.100
4 4.0000 5.800 6.000 6.612 6.928 2.112 2.201 0.107