Table 1 Standard Metric and USA Bolt Shank Dimensions (All dimensions in units of mm or mm2 unless otherwise specified.)

Coarse Pitch Threads Fine Pitch ThreadsSize

Desig- nation

Nominal (Major) Diam- eter,

Nominal Shank

Area, An

Threads per

Pitch (mm per

thread), p

Pitch Dia- meter, dp

Minor Dia- meter Area,

M, UNC, UNRC Tensile Stress Area,

MJ, UNJC Tensile Stress Area,

Threads per

Pitch Pitch Dia- meter, dp

Minor Dia-meter Area,

M, UNF, UNRF Tensile Stress Area,

MJ, UNJF Tensile Stress Area,

Dn inch, As A ts A ts inch, (mm per thread),

As A ts A ts

n n p

0 1.524 1.8241 80 0.3175 1.3178 0.9704 1.1588 1.3639M1.6 1.6 2.0106 0.35 1.3727 1.0762 1.27 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 1.792 2.0741M2 2 3.1416 0.4 1.7402 1.789 2.0732 2.37842 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 2.5 4.9087 0.45 2.2077 2.9801 3.3908 3.8283 2.5146 4.9662 48 0.52917 2.1709 2.6222 3.1386 3.7014 56 0.45357 2.22 2.9116 3.3741 3.87074 2.8448 6.3561 40 0.635 2.4324 3.2045 3.8922 4.6467 48 0.52917 2.5011 3.6555 4.2611 4.913

M3 3 7.0686 0.5 2.6752 4.4734 5.0308 5.621M3.5 3.5 9.6211 0.6 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 0.635 3.0928 5.6424 6.544 7.5124M4 4 12.566 0.7 3.5453 7.7496 8.7787 9.8728 4.1656 13.628 32 0.79375 3.65 7.7166 9.0379 10.464 36 0.70556 3.7073 8.291 9.5016 10.79510 4.826 18.292 24 1.0583 4.1386 9.3546 11.311 13.452 32 0.79375 4.3104 11.311 12.899 14.593M5 5 19.635 0.8 4.4804 12.683 14.183 15.76612 5.4864 23.641 24 1.0583 4.799 13.277 15.59 18.088 28 0.90714 4.8972 14.576 16.638 18.836M6 6 28.274 1 5.3505 17.894 20.123 22.4840.25 6.35 31.669 20 1.27 5.5251 17.351 20.53 23.976 28 0.90714 5.7608 21.006 23.467 26.065

0.3125 7.9375 49.483 18 1.4111 7.021 29.267 33.826 38.715 24 1.0583 7.2501 33.826 37.462 41.284M8 8 50.265 1.25 7.1881 32.841 36.609 40.581 1 7.3505 36.03 39.167 42.435

0.375 9.525 71.256 16 1.5875 8.4939 43.741 49.994 56.663 24 1.0583 8.8376 52.17 56.663 61.342M10 10 78.54 1.5 9.0257 52.292 57.99 63.981 1.25 9.1881 56.297 61.199 66.304

0.4375 11.112 96.987 14 1.8143 9.9341 60.21 68.586 77.508 20 1.27 10.288 70.327 76.591 83.123M12 12 113.1 1.75 10.863 76.247 84.267 92.687 1.25 11.188 86.037 92.072 98.3110.5 12.7 126.68 13 1.9538 11.431 81.103 91.548 102.63 20 1.27 11.875 95.903 103.2 110.76M14 14 153.94 2 12.701 104.71 115.44 126.7 1.5 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 13.371 121.82 130.96 140.420.625 15.875 197.93 11 2.3091 14.375 130.2 145.81 162.3 18 1.4111 14.958 154.86 165.13 175.74M16 16 201.06 2 14.701 144.12 156.67 169.74 1.5 15.026 157.47 167.25 177.320.75 19.05 285.02 10 2.54 17.4 194.84 215.78 237.79 16 1.5875 18.019 226.65 240.62 255M20 20 314.16 2.5 18.376 225.19 244.79 265.22 1.5 19.026 259 271.5 284.3M22* 22 380.13 2.5 20.376 281.53 303.4 326.09 1.5 21.026 319.2 333.06 347.210.875 22.225 387.95 9 2.8222 20.392 270.51 297.89 326.59 14 1.8143 21.047 310.03 328.69 347.9M24 24 452.39 3 22.051 324.27 352.5 381.91 2 22.701 364.61 384.42 404.74

1 25.4 506.71 8 3.175 23.338 355.51 390.8 427.77 12 2.1167 24.025 402.94 427.77 453.34M27* 27 572.56 3 25.051 427.09 459.41 492.9 2 25.701 473.22 495.74 518.791.125 28.575 641.3 7 3.6286 26.218 447.18 492.44 539.88 12 2.1167 27.2 523.82 552.08 581.08M30 30 706.86 3.5 27.727 518.99 560.59 603.79 2 28.701 595.96 621.2 646.971.25 31.75 791.73 7 3.6286 29.393 574.1 625.23 678.55 12 2.1167 30.375 660.54 692.22 724.65M33 33 855.3 3.5 30.727 647.19 693.55 2 31.701 732.83 760.8 789.291.375 34.925 957.99 6 4.2333 32.175 680.06 745.09 813.09 12 2.1167 33.55 813.09 848.2 884.06M36 36 1017.9 4 33.402 759.28 816.72 876.26 2 34.701 883.85 914.53 945.741.5 38.1 1140.1 6 4.2333 35.35 834.73 906.62 981.47 12 2.1167 36.725 981.47 1020 1059.3

Sheet1