Standard Metric and USA Bolt Shank Dimensions (All dimensions in units of mm or mm2 unless otherwise specified.)
| Coarse Pitch Threads | Fine Pitch Threads | |||||||||||||
| Size Desig- nation | Nominal (Major) Diam- eter, Dn |
Nominal Shank Area, An | Threads per inch, n |
Pitch (mm per thread), p | Pitch Dia- meter, dp | Minor Dia- meter Area, As |
M, UNC, UNRC Tensile Stress Area, A ts |
MJ, UNJC Tensile Stress Area, A ts |
Threads per inch, n |
Pitch (mm per thread), p |
Pitch Dia- meter, dp | Minor Dia- meter Area, As |
M, UNF, UNRF Tensile Stress Area, A ts |
MJ, UNJF Tensile Stress Area, A ts |
| 0 | 1.5240 | 1.8241 | 80 | 0.31750 | 1.3178 | 0.9704 | 1.1588 | 1.3639 | ||||||
| M1.6 | 1.6000 | 2.0106 | 0.35000 | 1.3727 | 1.0762 | 1.2700 | 1.4799 | |||||||
| 1 | 1.8542 | 2.7002 | 64 | 0.39688 | 1.5964 | 1.4074 | 1.6915 | 2.0016 | 72 | 0.35278 | 1.6251 | 1.5304 | 1.7920 | 2.0741 |
| M2 | 2.0000 | 3.1416 | 0.40000 | 1.7402 | 1.7890 | 2.0732 | 2.3784 | |||||||
| 2 | 2.1844 | 3.7476 | 56 | 0.45357 | 1.8898 | 1.9986 | 2.3847 | 2.8049 | 64 | 0.39688 | 1.9266 | 2.1874 | 2.5383 | 2.9153 |
| M2.5 | 2.5000 | 4.9087 | 0.45000 | 2.2077 | 2.9801 | 3.3908 | 3.8280 | |||||||
| 3 | 2.5146 | 4.9662 | 48 | 0.52917 | 2.1709 | 2.6222 | 3.1386 | 3.7014 | 56 | 0.45357 | 2.2200 | 2.9116 | 3.3741 | 3.8707 |
| 4 | 2.8448 | 6.3561 | 40 | 0.63500 | 2.4324 | 3.2045 | 3.8922 | 4.6467 | 48 | 0.52917 | 2.5011 | 3.6555 | 4.2611 | 4.9130 |
| M3 | 3.0000 | 7.0686 | 0.50000 | 2.6752 | 4.4734 | 5.0308 | 5.6210 | |||||||
| M3.5 | 3.5000 | 9.6211 | 0.60000 | 3.1103 | 5.9997 | 6.7752 | 7.5979 | |||||||
| 6 | 3.5052 | 9.6497 | 32 | 0.79375 | 2.9896 | 4.8075 | 5.8615 | 7.0199 | 40 | 0.63500 | 3.0928 | 5.6424 | 6.5440 | 7.5124 |
| M4 | 4.0000 | 12.566 | 0.70000 | 3.5453 | 7.7496 | 8.7787 | 9.8720 | |||||||
| 8 | 4.1656 | 13.628 | 32 | 0.79375 | 3.6500 | 7.7166 | 9.0379 | 10.464 | 36 | 0.70556 | 3.7073 | 8.2910 | 9.5016 | 10.795 |
| 10 | 4.8260 | 18.292 | 24 | 1.0583 | 4.1386 | 9.3546 | 11.311 | 13.452 | 32 | 0.79375 | 4.3104 | 11.311 | 12.899 | 14.593 |
| M5 | 5.0000 | 19.635 | 0.8000 | 4.4804 | 12.683 | 14.183 | 15.766 | |||||||
| 12 | 5.4864 | 23.641 | 24 | 1.0583 | 4.7990 | 13.277 | 15.590 | 18.088 | 28 | 0.90714 | 4.8972 | 14.576 | 16.638 | 18.836 |
| M6 | 6.0000 | 28.274 | 1.0000 | 5.3505 | 17.894 | 20.123 | 22.484 | |||||||
| 0.2500 | 6.3500 | 31.669 | 20 | 1.2700 | 5.5251 | 17.351 | 20.530 | 23.976 | 28 | 0.90714 | 5.7608 | 21.006 | 23.467 | 26.065 |
| 0.3125 | 7.9375 | 49.483 | 18 | 1.4111 | 7.0210 | 29.267 | 33.826 | 38.715 | 24 | 1.0583 | 7.2501 | 33.826 | 37.462 | 41.284 |
| M8 | 8.0000 | 50.265 | 1.2500 | 7.1881 | 32.841 | 36.609 | 40.581 | 1.0000 | 7.3505 | 36.030 | 39.167 | 42.435 | ||
| 0.3750 | 9.5250 | 71.256 | 16 | 1.5875 | 8.4939 | 43.741 | 49.994 | 56.663 | 24 | 1.0583 | 8.8376 | 52.170 | 56.663 | 61.342 |
| M10 | 10.000 | 78.540 | 1.5000 | 9.0257 | 52.292 | 57.990 | 63.981 | 1.2500 | 9.1881 | 56.297 | 61.199 | 66.304 | ||
| 0.4375 | 11.112 | 96.987 | 14 | 1.8143 | 9.9341 | 60.210 | 68.586 | 77.508 | 20 | 1.2700 | 10.288 | 70.327 | 76.591 | 83.123 |
| M12 | 12.000 | 113.10 | 1.7500 | 10.863 | 76.247 | 84.267 | 92.687 | 1.2500 | 11.188 | 86.037 | 92.072 | 98.311 | ||
| 0.5000 | 12.700 | 126.68 | 13 | 1.9538 | 11.431 | 81.103 | 91.548 | 102.63 | 20 | 1.2700 | 11.875 | 95.903 | 103.20 | 110.76 |
| M14 | 14.000 | 153.94 | 2.0000 | 12.701 | 104.71 | 115.44 | 126.70 | 1.5000 | 13.026 | 116.13 | 124.55 | 133.26 | ||
| 0.5625 | 14.288 | 160.33 | 12 | 2.1167 | 12.913 | 104.55 | 117.38 | 130.96 | 18 | 1.4111 | 13.371 | 121.82 | 130.96 | 140.42 |
| 0.6250 | 15.875 | 197.93 | 11 | 2.3091 | 14.375 | 130.20 | 145.81 | 162.30 | 18 | 1.4111 | 14.958 | 154.86 | 165.13 | 175.74 |
| M16 | 16.000 | 201.06 | 2.0000 | 14.701 | 144.12 | 156.67 | 169.74 | 1.5000 | 15.026 | 157.47 | 167.25 | 177.32 | ||
| 0.7500 | 19.050 | 285.02 | 10 | 2.5400 | 17.400 | 194.84 | 215.78 | 237.79 | 16 | 1.5875 | 18.019 | 226.65 | 240.62 | 255.00 |
| M20 | 20.000 | 314.16 | 2.5000 | 18.376 | 225.19 | 244.79 | 265.22 | 1.5000 | 19.026 | 259.00 | 271.50 | 284.30 | ||
| M22* | 22.000 | 380.13 | 2.5000 | 20.376 | 281.53 | 303.40 | 326.09 | 1.5000 | 21.026 | 319.20 | 333.06 | 347.21 | ||
| 0.8750 | 22.225 | 387.95 | 9 | 2.8222 | 20.392 | 270.51 | 297.89 | 326.59 | 14 | 1.8143 | 21.047 | 310.03 | 328.69 | 347.90 |
| M24 | 24.000 | 452.39 | 3.0000 | 22.051 | 324.27 | 352.50 | 381.91 | 2.0000 | 22.701 | 364.61 | 384.42 | 404.74 | ||
| 1.0000 | 25.400 | 506.71 | 8 | 3.1750 | 23.338 | 355.51 | 390.80 | 427.77 | 12 | 2.1167 | 24.025 | 402.94 | 427.77 | 453.34 |
| M27* | 27.000 | 572.56 | 3.0000 | 25.051 | 427.09 | 459.41 | 492.90 | 2.0000 | 25.701 | 473.22 | 495.74 | 518.79 | ||
| 1.1250 | 28.575 | 641.30 | 7 | 3.6286 | 26.218 | 447.18 | 492.44 | 539.88 | 12 | 2.1167 | 27.200 | 523.82 | 552.08 | 581.08 |
| M30 | 30.000 | 706.86 | 3.5000 | 27.727 | 518.99 | 560.59 | 603.79 | 2.0000 | 28.701 | 595.96 | 621.20 | 646.97 | ||
| 1.2500 | 31.750 | 791.73 | 7 | 3.6286 | 29.393 | 574.10 | 625.23 | 678.55 | 12 | 2.1167 | 30.375 | 660.54 | 692.22 | 724.65 |
| M33 | 33.000 | 855.30 | 3.5000 | 30.727 | 647.19 | 693.55 | 2.0000 | 31.701 | 732.83 | 760.80 | 789.29 | |||
| 1.3750 | 34.925 | 957.99 | 6 | 4.2333 | 32.175 | 680.06 | 745.09 | 813.09 | 12 | 2.1167 | 33.550 | 813.09 | 848.20 | 884.06 |
| M36 | 36.000 | 1017.9 | 4.0000 | 33.402 | 759.28 | 816.72 | 876.26 | 2.0000 | 34.701 | 883.85 | 914.53 | 945.74 | ||
| 1.5000 | 38.100 | 1140.1 | 6 | 4.2333 | 35.350 | 834.73 | 906.62 | 981.47 | 12 | 2.1167 | 36.725 | 981.47 | 1020.0 | 1059.3 |