#### External ISO Metric Trapezoidal Screw Threads Table Chart Sizes TR8 - TR315

Trapezoidal threads are codified by DIN 103. Although metric screw threads are generally more prevalent worldwide than imperial threads, the Acme thread is very common worldwide, and may be more widely used than the trapezoidal metric thread.

Trapezoidal threads are defined as follows by ISO standards: ISO 2901, ISO 2901, ISO 2903, ISO 2904 and ISO 103. Gages ISO metric trapezoidal screw thread are defined in the DIN 103-9 .

TR 8 x 1.5

where Tr designates a trapezoidal thread, 8 is the nominal diameter in millimeters, and 1.5 is the pitch in millimeters. When there is no suffix it is a single start thread. If there is a suffix then the value after the multiplication sign is the lead and the value in the parentheses is the pitch. For example:

TR 60 x 18 (P9) LH would denoted two starts, as the lead divided by the pitch is two. The "LH" denotes a left hand thread.

The thread form and related equations for calculating Trapezoidal Screw Threads can be seen here:
External ISO Metric Trapezoidal Screw Threads Chart TR320 - TR1120

Click on image to enlarge

 ISO Thread Thread Designation Pitch External ISO Metric Trapezoidal Threads Table Tolerance Class Major Dia Pitch Dia Minor Dia Max Min Max Min Max Min TR8x1.5 1.5 7e 8.000 7.850 7.183 7.013 6.200 5.921 TR9x1.5 1.5 7e 9.000 8.850 8.183 8.013 7.200 6.921 TR9x2 2 7e 9.000 8.820 7.929 7.739 6.500 6.191 TR10x1.5 1.5 7e 10.000 9.850 9.183 9.013 8.200 7.921 TR10x2 2 7e 10.000 9.820 8.929 8.739 7.500 7.191 TR11x2 2 7e 11.000 10.820 9.929 9.739 8.500 8.191 TR11x3 3 7e 11.000 10.764 9.415 9.203 7.500 7.150 TR12x2 2 7e 12.000 11.820 10.929 10.729 9.500 9.179 TR12x3 3 7e 12.000 11.764 10.415 10.191 8.500 8.135 TR14x2 2 7e 14.000 13.820 12.929 12.729 11.500 11.179 TR14x3 3 7e 14.000 13.764 12.415 12.191 10.500 10.135 TR16x2 2 7e 16.000 15.820 14.929 14.729 13.500 13.179 TR16x3 3 7e 16.000 15.764 14.415 14.191 12.500 12.135 TR16x4 4 7e 16.000 15.700 13.905 13.640 11.500 11.074 TR18x2 2 7e 18.000 17.820 16.929 16.729 15.500 15.179 TR18x3 3 7e 18.000 17.764 16.415 16.191 14.500 14.135 TR18x4 4 7e 18.000 17.700 15.905 15.640 13.500 13.074 TR20x2 2 7e 20.000 19.820 18.929 18.729 17.500 17.179 TR20x3 3 7e 20.000 19.764 18.415 18.191 16.500 16.135 TR20x4 4 7e 20.000 19.700 17.905 17.640 15.500 15.074 TR22x3 3 7e 22.000 21.764 20.415 20.191 18.500 18.135 TR22x5 5 7e 22.000 21.665 19.394 19.114 16.500 16.044 TR22x8 8 7e 22.000 21.550 17.868 17.513 13.500 12.924 TR24x3 3 7e 24.000 23.764 22.415 22.165 20.500 20.103 TR24x5 5 7e 24.000 23.665 21.394 21.094 18.500 18.019 TR24x8 8 7e 24.000 23.550 19.868 19.493 15.500 14.899 TR26x3 3 7e 26.000 25.764 24.415 24.165 22.500 22.103 TR26x5 5 7e 26.000 25.665 23.394 23.094 20.500 20.019 TR26x8 8 7e 26.000 25.550 21.868 21.493 17.500 16.899 TR28x3 3 7e 28.000 27.764 26.415 26.165 24.500 24.103 TR28x5 5 7e 28.000 27.665 25.394 25.094 22.500 22.019 TR28x8 8 7e 28.000 27.550 23.868 23.493 19.500 18.899 TR30x3 3 7e 30.000 29.764 28.415 28.165 26.500 26.103 TR30x6 6 7e 30.000 29.575 26.875 26.540 23.000 22.463 TR30x10 10 7e 30.000 29.470 24.850 24.450 19.000 18.350 TR32x3 3 7e 32.000 31.764 30.415 30.165 28.500 28.103 TR32x6 6 7e 32.000 31.575 28.875 28.540 25.000 24.463 TR32x10 10 7e 32.000 31.470 26.850 26.450 21.000 20.350 TR34x3 3 7e 34.000 33.764 32.415 32.165 30.500 30.103 TR34x6 6 7e 34.000 33.575 30.875 30.540 27.000 26.463 TR34x10 10 7e 34.000 33.470 28.850 28.450 23.000 22.350 TR36x3 3 7e 36.000 35.764 34.415 34.165 32.500 32.103 TR36x6 6 7e 36.000 35.575 32.875 32.540 29.000 28.463 TR36x10 10 7e 36.000 35.470 30.850 30.450 25.000 24.350 TR38x3 3 7e 38.000 37.764 36.415 36.165 34.500 34.103 TR38x7 7 7e 38.000 37.575 34.375 34.020 30.000 29.431 TR38x10 10 7e 38.000 37.470 32.850 32.450 27.000 26.350 TR40x3 3 7e 40.000 39.764 38.415 38.165 36.500 36.103 TR40x7 7 7e 40.000 39.575 36.375 36.020 32.000 31.431 TR40x10 10 7e 40.000 39.470 34.850 34.450 29.000 28.350 TR42x3 3 7e 42.000 41.764 40.415 40.165 38.500 38.103 TR42x7 7 7e 42.000 41.575 38.375 38.020 34.000 33.431 TR42x10 10 7e 42.000 41.470 36.850 36.450 31.000 30.350 TR44x3 3 7e 44.000 43.764 42.415 42.165 40.500 40.103 TR44x7 7 7e 44.000 43.575 40.375 40.020 36.000 35.431 TR44x12 12 7e 44.000 43.400 37.830 37.405 31.000 30.309 TR46x3 3 7e 46.000 45.764 44.415 44.150 42.500 42.084 TR46x8 8 7e 46.000 45.550 41.868 41.468 37.000 36.368 TR46x12 12 7e 46.000 45.400 39.830 39.355 33.000 32.246 TR48x3 3 7e 48.000 47.764 46.415 46.150 44.500 44.084 TR48x8 8 7e 48.000 47.550 43.868 43.468 39.000 38.368 TR48x12 12 7e 48.000 47.400 41.830 41.355 35.000 34.246 TR50x3 3 7e 50.000 49.764 48.415 48.150 46.500 46.084 TR50x8 8 7e 50.000 49.550 45.868 45.468 41.000 40.368 TR50x12 12 7e 50.000 49.400 43.830 43.355 37.000 36.246 TR52x3 3 7e 52.000 51.764 50.415 50.150 48.500 48.084 TR52x8 8 7e 52.000 51.550 47.868 47.468 43.000 42.368 TR52x12 12 7e 52.000 51.400 45.830 45.355 39.000 38.246 TR55x3 3 7e 55.000 54.764 53.415 53.150 51.500 51.084 TR55x9 9 7e 55.000 54.500 50.360 49.935 45.000 44.329 TR55x14 14 7e 55.000 54.330 47.820 47.320 39.000 38.195 TR60x3 3 7e 60.000 59.764 58.415 58.150 56.500 56.084 TR60x9 9 7e 60.000 59.500 55.360 54.935 50.000 49.329 TR60x14 14 7e 60.000 59.330 52.820 52.320 44.000 43.195 TR65x4 4 7e 65.000 64.700 62.905 62.605 60.500 60.030 TR65x10 10 7e 65.000 64.470 59.850 59.425 54.000 53.319 TR65x16 16 7e 65.000 64.290 56.810 56.280 47.000 46.147 TR70x4 4 7e 70.000 69.700 67.905 67.605 65.500 65.030 TR70x10 10 7e 70.000 69.470 64.850 64.425 59.000 58.319 TR70x16 16 7e 70.000 69.290 61.810 61.280 52.000 51.147 TR75x4 4 7e 75.000 74.700 72.905 72.605 70.500 70.030 TR75x10 10 7e 75.000 74.470 69.850 69.425 64.000 63.319 TR75x16 16 7e 75.000 74.290 66.810 66.280 57.000 56.147 TR80x4 4 7e 80.000 79.700 77.905 77.605 75.500 75.030 TR80x10 10 7e 80.000 79.470 74.850 74.425 69.000 68.319 TR80x16 16 7e 80.000 79.290 71.810 71.280 62.000 61.147 TR85x4 4 7e 85.000 84.700 82.905 82.605 80.500 80.030 TR85x12 12 7e 85.000 84.400 78.840 78.365 72.000 71.246 TR85x18 18 7e 85.000 84.200 75.800 75.240 65.000 64.100 TR90x4 4 7e 90.000 89.700 87.905 87.605 85.500 85.030 TR90x12 12 7e 90.000 89.400 83.830 83.355 77.000 76.246 TR90x18 18 7e 90.000 89.200 80.800 80.240 70.000 69.100 TR95x4 4 7e 95.000 94.700 92.905 92.590 90.500 90.011 TR95x12 12 7e 95.000 94.400 88.830 88.300 82.000 81.177 TR95x18 18 7e 95.000 94.200 85.800 85.200 75.000 74.050 TR100x4 4 7e 100.000 99.700 97.905 97.590 95.500 95.011 TR100x12 12 7e 100.000 99.400 93.830 93.300 87.000 86.177 TR100x20 20 7e 100.000 99.150 89.788 89.188 78.000 77.038 TR105x4 4 7e 105.000 104.700 102.905 102.590 100.500 100.011 TR105x12 12 7e 105.000 104.400 98.830 98.300 92.000 91.177 TR105x20 20 7e 105.000 104.150 94.788 94.188 83.000 82.038 TR110x4 4 7e 110.000 109.700 107.905 107.590 105.500 105.011 TR110x12 12 7e 110.000 109.400 103.830 103.300 97.000 96.177 TR110x20 20 7e 110.000 109.150 99.788 99.188 88.000 87.038 TR115x6 6 7e 115.000 114.575 111.875 111.500 108.000 107.413 TR115x12 12 7e 115.000 114.400 108.830 108.330 102.000 101.215 TR115x14 14 7e 115.000 114.330 107.820 107.290 99.000 98.157 TR115x22 22 7e 115.000 114.100 103.776 103.146 91.000 89.989 TR120x6 6 7e 120.000 119.575 116.875 116.500 113.000 112.413 TR120x12 12 7e 120.000 119.400 113.830 113.330 107.000 106.215 TR120x14 14 7e 120.000 119.330 112.820 112.290 104.000 103.157 TR120x22 22 7e 120.000 119.100 108.776 108.146 96.000 94.989 TR125x6 6 7e 125.000 124.575 121.875 121.500 118.000 117.413 TR125x12 12 7e 125.000 124.400 118.830 118.330 112.000 111.215 TR125x14 14 7e 125.000 124.330 117.820 117.290 109.000 108.157 TR125x22 22 7e 125.000 124.100 113.776 113.146 101.000 99.989 TR130x6 6 7e 130.000 129.575 126.875 126.500 123.000 122.413 TR130x12 12 7e 130.000 129.400 123.830 123.330 117.000 116.215 TR130x14 14 7e 130.000 129.330 122.820 122.290 114.000 113.157 TR130x22 22 7e 130.000 129.100 118.776 118.146 106.000 104.989 TR135x6 6 7e 135.000 134.575 131.875 131.500 128.000 127.413 TR135x12 12 7e 135.000 134.400 128.830 128.330 122.000 121.215 TR135x14 14 7e 135.000 134.330 127.820 127.290 119.000 118.157 TR135x24 24 7e 135.000 134.050 122.764 122.094 109.000 107.926 TR140x6 6 7e 140.000 139.575 136.875 136.500 133.000 132.413 TR140x12 12 7e 140.000 139.400 133.830 133.330 127.000 126.215 TR140x14 14 7e 140.000 139.330 132.820 132.290 124.000 123.157 TR140x24 24 7e 140.000 139.050 127.764 127.094 114.000 112.926 TR145x6 6 7e 145.000 144.575 141.875 141.500 138.000 137.413 TR145x12 12 7e 145.000 144.400 138.830 138.330 132.000 131.215 TR145x14 14 7e 145.000 144.330 137.820 137.290 129.000 128.157 TR145x24 24 7e 145.000 144.050 132.764 132.094 119.000 117.926 TR150x6 6 7e 150.000 149.575 146.875 146.500 143.000 142.413 TR150x12 12 7e 150.000 149.400 143.830 143.330 137.000 136.215 TR150x16 16 7e 150.000 149.290 141.810 141.250 132.000 131.110 TR150x24 24 7e 150.000 149.050 137.764 137.094 124.000 122.926 TR155x6 6 7e 155.000 154.575 151.875 151.500 148.000 147.413 TR155x12 12 7e 155.000 154.400 148.830 148.330 142.000 141.215 TR155x16 16 7e 155.000 154.290 146.810 146.250 137.000 136.110 TR155x24 24 7e 155.000 154.050 142.764 142.094 129.000 127.926 TR160x6 6 7e 160.000 159.575 156.875 156.500 153.000 152.413 TR160x12 12 7e 160.000 159.400 153.830 153.330 147.000 146.215 TR160x16 16 7e 160.000 159.290 151.810 151.250 142.000 141.110 TR160x28 28 7e 160.000 158.940 145.750 145.040 130.000 128.862 TR165x6 6 7e 165.000 164.575 161.875 161.500 158.000 157.413 TR165x12 12 7e 165.000 164.400 158.830 158.330 152.000 151.215 TR165x16 16 7e 165.000 164.290 156.810 156.250 147.000 146.110 TR165x28 28 7e 165.000 163.940 150.750 150.040 135.000 133.862 TR170x6 6 7e 170.000 169.575 166.875 166.500 163.000 162.413 TR170x12 12 7e 170.000 169.400 163.830 163.330 157.000 156.215 TR170x16 16 7e 170.000 169.290 161.810 161.250 152.000 151.110 TR170x28 28 7e 170.000 168.940 155.750 155.040 140.000 138.862 TR175x8 8 7e 175.000 174.550 170.868 170.443 166.500 165.837 TR175x12 12 7e 175.000 174.400 168.830 168.330 162.000 161.215 TR175x16 16 7e 175.000 174.290 166.810 166.250 157.000 156.110 TR175x28 28 7e 175.000 173.940 160.750 160.040 145.000 143.862 TR180x8 8 7e 180.000 179.550 175.868 175.443 171.500 170.837 TR180x12 12 7e 180.000 179.400 173.830 173.330 167.000 166.215 TR180x18 18 7e 180.000 179.200 170.800 170.200 160.000 159.050 TR180x28 28 7e 180.000 178.940 165.750 165.040 150.000 148.862 TR185x8 8 7e 185.000 184.550 180.868 180.418 176.500 175.805 TR185x12 12 7e 185.000 184.400 178.830 178.300 172.000 171.177 TR185x18 18 7e 185.000 184.200 175.800 175.170 165.000 164.013 TR185x24 24 7e 185.000 184.050 172.764 172.054 159.000 157.876 TR185x32 32 7e 185.000 183.880 168.735 167.935 151.000 149.735 TR190x8 8 7e 190.000 189.550 185.868 185.418 181.500 180.805 TR190x12 12 7e 190.000 189.400 183.830 183.300 177.000 176.177 TR190x18 18 7e 190.000 189.200 180.800 180.170 170.000 169.013 TR190x24 24 7e 190.000 189.050 177.764 177.054 164.000 162.876 TR190x32 32 7e 190.000 188.880 173.735 172.935 156.000 154.735 TR195x8 8 7e 195.000 194.550 190.868 190.418 186.500 185.805 TR195x12 12 7e 195.000 194.400 188.830 188.300 182.000 181.177 TR195x18 18 7e 195.000 194.200 185.800 185.170 175.000 174.013 TR195x24 24 7e 195.000 194.050 182.764 182.054 169.000 167.876 TR195x32 32 7e 195.000 193.880 178.735 177.935 161.000 159.735 TR200x8 8 7e 200.000 199.550 195.868 195.418 191.500 190.805 TR200x12 12 7e 200.000 199.400 193.830 193.300 187.000 186.177 TR200x18 18 7e 200.000 199.200 190.800 190.170 180.000 179.013 TR200x24 24 7e 200.000 199.050 187.764 187.054 174.000 172.876 TR200x32 32 7e 200.000 198.880 183.735 182.935 166.000 164.735 TR205x4 4 7e 205.000 204.700 202.905 202.550 200.500 199.979 TR210x4 4 7e 210.000 209.700 207.905 207.550 205.500 204.979 TR210x8 8 7e 210.000 209.550 205.868 205.418 201.500 200.805 TR210x12 12 7e 210.000 209.400 203.830 203.300 197.000 196.177 TR210x20 20 7e 210.000 209.150 199.788 199.118 188.000 186.950 TR210x24 24 7e 210.000 209.050 197.764 197.054 184.000 182.876 TR210x36 36 7e 210.000 208.750 191.720 190.870 172.000 170.657 TR215x4 4 7e 215.000 214.700 212.905 212.550 210.500 209.979 TR220x4 4 7e 220.000 219.700 217.905 217.550 215.500 214.979 TR220x8 8 7e 220.000 219.550 215.868 215.418 211.500 210.805 TR220x12 12 7e 220.000 219.400 213.830 213.300 207.000 206.177 TR220x20 20 7e 220.000 219.150 209.788 209.118 198.000 196.950 TR220x24 24 7e 220.000 219.050 207.764 207.054 194.000 192.876 TR220x36 36 7e 220.000 218.750 201.720 200.870 182.000 180.657 TR230x4 4 7e 230.000 229.700 227.905 227.550 225.500 224.979 TR230x8 8 7e 230.000 229.550 225.868 225.418 221.500 220.805 TR230x12 12 7e 230.000 229.400 223.830 223.300 217.000 216.177 TR230x20 20 7e 230.000 229.150 219.788 219.118 208.000 206.950 TR230x24 24 7e 230.000 229.050 217.764 217.054 204.000 202.876 TR230x36 36 7e 230.000 228.750 211.720 210.870 192.000 190.657 TR235x4 4 7e 235.000 234.700 232.905 232.550 230.500 229.979 TR240x4 4 7e 240.000 239.700 237.905 237.550 235.500 234.979 TR240x8 8 7e 240.000 239.550 235.868 235.418 231.500 230.805 TR240x12 12 7e 240.000 239.400 233.830 233.300 227.000 226.177 TR240x20 20 7e 240.000 239.150 229.788 229.118 218.000 216.950 TR240x22 22 7e 240.000 239.100 228.776 228.106 216.000 214.938 TR240x24 24 7e 240.000 239.050 227.764 227.054 214.000 212.876 TR240x36 36 7e 240.000 238.750 221.720 220.870 202.000 200.657 TR250x4 4 7e 250.000 249.700 247.905 247.550 245.500 244.979 TR250x12 12 7e 250.000 249.400 243.830 243.300 237.000 236.177 TR250x22 22 7e 250.000 249.100 238.776 238.106 226.000 224.938 TR250x24 24 7e 250.000 249.050 237.764 237.054 224.000 222.876 TR250x40 40 7e 250.000 248.680 229.700 228.850 208.000 206.637 TR260x4 4 7e 260.000 259.700 257.905 257.550 255.500 254.979 TR260x12 12 7e 260.000 259.400 253.830 253.300 247.000 246.177 TR260x20 20 7e 260.000 259.150 249.788 249.118 238.000 236.950 TR260x22 22 7e 260.000 259.100 248.776 248.106 236.000 234.938 TR260x24 24 7e 260.000 259.050 247.764 247.054 234.000 232.876 TR260x40 40 7e 260.000 258.680 239.700 238.850 218.000 216.637 TR270x12 12 7e 270.000 269.400 263.830 263.300 257.000 256.177 TR270x24 24 7e 270.000 269.050 257.764 257.054 244.000 242.876 TR270x40 40 7e 270.000 268.680 249.700 248.850 228.000 226.637 TR275x4 4 7e 275.000 274.700 272.905 272.550 270.500 269.979 TR280x4 4 7e 280.000 279.700 277.905 277.550 275.500 274.979 TR280x12 12 7e 280.000 279.400 273.830 273.300 267.000 266.177 TR280x24 24 7e 280.000 279.050 267.764 267.054 254.000 252.876 TR280x40 40 7e 280.000 278.680 259.700 258.850 238.000 236.637 TR290x4 4 7e 290.000 289.700 287.905 287.550 285.500 284.979 TR290x12 12 7e 290.000 289.400 283.830 283.300 277.000 276.177 TR290x24 24 7e 290.000 289.050 277.764 277.054 264.000 262.876 TR290x44 44 7e 290.000 288.600 267.685 266.785 244.000 242.560 TR295x4 4 7e 295.000 294.700 292.905 292.550 290.500 289.979 TR300x4 4 7e 300.000 299.700 297.905 297.550 295.500 294.979 TR300x12 12 7e 300.000 299.400 293.830 293.300 287.000 286.177 TR300x24 24 7e 300.000 299.050 287.764 287.054 274.000 272.876 TR300x44 44 7e 300.000 298.600 277.685 276.785 254.000 252.560 TR310x5 5 7e 310.000 309.665 307.394 307.039 304.500 303.979 TR315x5 5 7e 315.000 314.665 312.394 312.039 309.500 308.979

Related: