The following O-Ring tolerances are for general purpose O-Rings and X-Rings. Tighter O-Ring tolerances are available for high performance applications as much as 75% to 50% tighter than general purpose listed here. USA Military and Aerospace grade O-Rings typically refer to AS568 O-Ring Tolerances (slightly tighter than general purpose) and are available standard with most military and aerospace O-Ring specifications. Please contact us to review capabilities for your application.
General Purpose O-Ring Cross Section Tolerances
Cross Section (MM) | Tolerance (MM) | Cross Section (IN) | Tolerance (IN) |
|---|---|---|---|
| 0.00 to 1.79 | +/- 0.07 | 0.00 to 0.069 | +/- 0.003 |
| 1.80 to 2.64 | +/- 0.08 | 0.070 to 0.102 | +/- 0.003 |
| 2.65 to 3.54 | +/- 0.09 | 0.103 to 0.138 | +/- 0.004 |
| 3.55 to 5.29 | +/- 0.10 | 0.139 to 0.209 | +/- 0.004 |
| 5.30 to 6.99 | +/- 0.13 | 0.210 to 0.274 | +/- 0.005 |
| 7.00 to 8.00 | +/- 0.15 | 0.275 to 0.314 | +/- 0.006 |
| 8.01 to 10.00 | +/- 0.20 | 0.315 to 0.394 | +/- 0.008 |
| 10.01 to 15.00 | +/- 0.25 | 0.395 to 0.590 | +/- 0.010 |
| 15.01 to 25.00 | +/- 0.35 | 0.591 to 0.984 | +/- 0.014 |
| 25.01 to 100.00 | +/- 0.45 | 0.985 to 3.937 | +/- 0.018 |
General Purpose O-Ring Inside Diameter Tolerances
Inside Diameter (MM) | Tolerance (MM) | Inside Diameter (IN) | Tolerance (IN) |
|---|---|---|---|
| 0.00 to 1.79 | +/- 0.12 | 0.000 to 0.070 | +/- 0.005 |
| 1.80 to 2.80 | +/- 0.13 | 0.071 to 0.110 | +/- 0.005 |
| 2.81 to 4.00 | +/- 0.14 | 0.111 to 0.157 | +/- 0.006 |
| 4.01 to 5.30 | +/- 0.15 | 0.158 to 0.208 | +/- 0.006 |
| 5.31 to 7.10 | +/- 0.16 | 0.209 to 0.279 | +/- 0.006 |
| 7.11 to 8.50 | +/- 0.17 | 0.280 to 0.334 | +/- 0.007 |
| 8.51 to 9.75 | +/- 0.18 | 0.335 to 0.383 | +/- 0.007 |
| 9.76 to 11.80 | +/- 0.19 | 0.384 to 0.464 | +/- 0.007 |
| 11.81 to 13.20 | +/- 0.21 | 0.465 to 0.519 | +/- 0.008 |
| 13.21 to 15.00 | +/- 0.22 | 0.520 to 0.590 | +/- 0.009 |
| 15.01 to 16.00 | +/- 0.23 | 0.591 to 0.629 | +/- 0.009 |
| 16.01 to 17.00 | +/- 0.24 | 0.630 to 0.669 | +/- 0.009 |
| 17.01 to 19.00 | +/- 0.25 | 0.670 to 0.747 | +/- 0.010 |
| 19.01 to 20.60 | +/- 0.26 | 0.748 to 0.810 | +/- 0.010 |
| 20.61 to 21.20 | +/- 0.27 | 0.811 to 0.834 | +/- 0.011 |
| 21.21 to 22.40 | +/- 0.28 | 0.835 to 0.881 | +/- 0.011 |
| 22.41 to 23.60 | +/- 0.29 | 0.882 to 0.929 | +/- 0.011 |
| 23.61 to 25.00 | +/- 0.30 | 0.930 to 0.984 | +/- 0.012 |
| 25.01 to 26.50 | +/- 0.31 | 0.985 to 1.043 | +/- 0.012 |
| 26.51 to 28.00 | +/- 0.32 | 1.044 to 1.102 | +/- 0.013 |
| 28.01 to 29.00 | +/- 0.33 | 1.103 to 1.141 | +/- 0.013 |
| 29.01 to 30.00 | +/- 0.34 | 1.142 to 1.180 | +/- 0.013 |
| 30.01 to 31.50 | +/- 0.35 | 1.181 to 1.240 | +/- 0.014 |
| 31.51 to 33.50 | +/- 0.36 | 1.241 to 1.318 | +/- 0.014 |
| 33.51 to 34.50 | +/- 0.37 | 1.319 to 1.358 | +/- 0.015 |
| 34.51 to 36.50 | +/- 0.38 | 1.359 to 1.436 | +/- 0.015 |
| 36.51 to 37.50 | +/- 0.39 | 1.437 to 1.476 | +/- 0.015 |
| 37.51 to 38.70 | +/- 0.40 | 1.477 to 1.574 | +/- 0.016 |
| 40.01 to 41.20 | +/- 0.42 | 1.575 to 1.621 | +/- 0.017 |
| 41.21 to 42.50 | +/- 0.43 | 1.622 to 1.673 | +/- 0.017 |
| 42.51 to 45.00 | +/- 0.44 | 1.674 to 1.771 | +/- 0.017 |
| 45.01 to 46.20 | +/- 0.45 | 1.772 to 1.818 | +/- 0.018 |
| 46.21 to 47.50 | +/- 0.46 | 1.819 to 1.869 | +/- 0.018 |
| 47.51 to 48.70 | +/- 0.47 | 1.870 to 1.917 | +/- 0.019 |
| 48.71 to 50.00 | +/- 0.48 | 1.918 to 1.968 | +/- 0.019 |
| 50.01 to 51.50 | +/- 0.49 | 1.969 to 2.027 | +/- 0.019 |
| 51.51 to 53.00 | +/- 0.50 | 2.028 to 2.086 | +/- 0.020 |
| 53.01 to 54.50 | +/- 0.51 | 2.087 to 2.145 | +/- 0.020 |
| 54.51 to 56.00 | +/- 0.52 | 2.146 to 2.204 | +/- 0.020 |
| 56.01 to 58.00 | +/- 0.54 | 2.205 to 2.283 | +/- 0.021 |
| 58.01 to 60.00 | +/- 0.55 | 2.284 to 2.362 | +/- 0.022 |
| 60.01 to 61.50 | +/- 0.56 | 2.363 to 2.421 | +/- 0.022 |
| 61.51 to 63.00 | +/- 0.57 | 2.422 to 2.480 | +/- 0.022 |
| 63.01 to 65.00 | +/- 0.58 | 2.481 to 2.558 | +/- 0.023 |
| 65.01 to 67.00 | +/- 0.60 | 2.559 to 2.637 | +/- 0.024 |
| 67.01 to 69.00 | +/- 0.61 | 2.638 to 2.716 | +/- 0.024 |
| 69.01 to 71.00 | +/- 0.63 | 2.717 to 2.795 | +/- 0.025 |
| 71.01 to 73.00 | +/- 0.64 | 2.796 to 2.873 | +/- 0.021 |
| 73.01 to 75.00 | +/- 0.65 | 2.874 to 2.952 | +/- 0.026 |
| 75.01 to 77.50 | +/- 0.67 | 2.953 to 3.051 | +/- 0.026 |
| 77.51 to 80.00 | +/- 0.69 | 3.052 to 3.149 | +/- 0.027 |
| 80.01 to 82.50 | +/- 0.71 | 3.150 to 3.247 | +/- 0.028 |
| 82.51 to 85.00 | +/- 0.72 | 3.248 to 3.346 | +/- 0.028 |
| 85.01 to 87.50 | +/- 0.74 | 3.347 to 3.444 | +/- 0.029 |
| 87.51 to 90.00 | +/- 0.76 | 3.445 to 3.543 | +/- 0.030 |
| 90.01 to 92.50 | +/- 0.77 | 3.544 to 3.641 | +/- 0.030 |
| 92.51 to 95.00 | +/- 0.79 | 3.642 to 3.740 | +/- 0.031 |
| 95.01 to 100.00 | +/- 0.81 | 3.741 to 3.937 | +/- 0.032 |
| 100.01 to 103.00 | +/- 0.85 | 3.938 to 4.055 | +/- 0.033 |
| 103.01 to 106.00 | +/- 0.87 | 4.056 to 4.173 | +/- 0.034 |
| 106.01 to 109.00 | +/- 0.89 | 4.174 to 4.291 | +/- 0.035 |
| 109.01 to 112.00 | +/- 0.91 | 4.292 to 4.409 | +/- 0.036 |
| 112.01 to 115.00 | +/- 0.93 | 4.410 to 4.527 | +/- 0.037 |
| 115.01 to 118.00 | +/- 0.95 | 4.528 to 4.645 | +/- 0.037 |
| 118.01 to 122.00 | +/- 0.97 | 4.646 to 4.803 | +/- 0.038 |
| 122.01 to 125.00 | +/- 0.99 | 4.804 to 4.921 | +/- 0.039 |
| 125.01 to 128.00 | +/- 1.01 | 4.922 to 5.039 | +/- 0.040 |
| 128.01 to 132.00 | +/- 1.04 | 5.040 to 5.196 | +/- 0.041 |
| 132.01 to 136.00 | +/- 1.07 | 5.197 to 5.354 | +/- 0.042 |
| 136.01 to 140.00 | +/- 1.09 | 5.355 to 5.511 | +/- 0.043 |
| 140.01 to 142.50 | +/- 1.11 | 5.512 to 5.610 | +/- 0.044 |
| 142.51 to 145.00 | +/- 1.13 | 5.611 to 5.708 | +/- 0.044 |
| 145.01 to 147.50 | +/- 1.14 | 5.709 to 5.806 | +/- 0.045 |
| 147.51 to 150.00 | +/- 1.16 | 5.807 to 5.905 | +/- 0.046 |
| 150.01 to 152.50 | +/- 1.18 | 5.906 to 6.003 | +/- 0.046 |
| 152.51 to 155.00 | +/- 1.19 | 6.004 to 6.102 | +/- 0.047 |
| 155.01 to 157.50 | +/- 1.21 | 6.103 to 6.200 | +/- 0.048 |
| 157.51 to 160.00 | +/- 1.23 | 6.201 to 6.299 | +/- 0.048 |
| 160.01 to 162.50 | +/- 1.24 | 6.300 to 6.397 | +/- 0.049 |
| 162.51 to 165.00 | +/- 1.25 | 6.398 to 6.495 | +/- 0.049 |
| 165.01 to 167.50 | +/- 1.28 | 6.496 to 6.594 | +/- 0.050 |
| 167.51 to 170.00 | +/- 1.29 | 6.595 to 6.692 | +/- 0.051 |
| 170.01 to 172.50 | +/- 1.31 | 6.693 to 6.791 | +/- 0.052 |
| 172.51 to 175.00 | +/- 1.33 | 6.792 to 6.889 | +/- 0.052 |
| 175.01 to 177.50 | +/- 1.34 | 6.890 to 6.988 | +/- 0.053 |
| 177.51 to 180.00 | +/- 1.36 | 6.989 to 7.184 | +/- 0.054 |
| 182.51 to 185.00 | +/- 1.39 | 7.185 to 7.283 | +/- 0.055 |
| 185.01 to 187.50 | +/- 1.41 | 7.284 to 7.381 | +/- 0.056 |
| 187.51 to 190.00 | +/- 1.43 | 7.382 to 7.480 | +/- 0.056 |
| 190.01 to 195.00 | +/- 1.45 | 7.481 to 7.677 | +/- 0.057 |
| 195.01 to 200.00 | +/- 1.49 | 7.678 to 7.873 | +/- 0.059 |
| 200.01 to 203.00 | +/- 1.51 | 7.874 to 7.992 | +/- 0.059 |
| 203.01 to 206.00 | +/- 1.53 | 7.993 to 8.110 | +/- 0.060 |
| 206.01 to 212.00 | +/- 1.57 | 8.111 to 8.346 | +/- 0.062 |
| 212.01 to 218.00 | +/- 1.61 | 8.347 to 8.582 | +/- 0.063 |
| 218.01 to 224.00 | +/- 1.65 | 8.583 to 8.818 | +/- 0.065 |
| 224.01 to 227.00 | +/- 1.67 | 8.819 to 8.936 | +/- 0.066 |
| 227.01 to 230.00 | +/- 1.69 | 8.937 to 9.054 | +/- 0.067 |
| 230.01 to 236.00 | +/- 1.73 | 9.055 to 9.291 | +/- 0.068 |
| 236.01 to 239.00 | +/- 1.75 | 9.292 to 9.409 | +/- 0.069 |
| 239.01 to 243.00 | +/- 1.77 | 9.410 to 9.566 | +/- 0.070 |
| 243.01 to 250.00 | +/- 1.82 | 9.567 to 9.842 | +/- 0.072 |
| 250.01 to 254.00 | +/- 1.84 | 9.843 to 9.999 | +/- 0.072 |
| 254.01 to 258.00 | +/- 1.87 | 10.000 to 10.157 | +/- 0.074 |
| 258.01 to 261.00 | +/- 1.89 | 10.158 to 10.275 | +/- 0.074 |
| 261.01 to 265.00 | +/- 1.91 | 10.276 to 10.432 | +/- 0.075 |
| 265.01 to 268.00 | +/- 1.92 | 10.433 to 10.551 | +/- 0.076 |
| 268.01 to 272.00 | +/- 1.96 | 10.552 to 10.708 | +/- 0.077 |
| 272.01 to 276.00 | +/- 1.98 | 10.709 to 10.866 | +/- 0.078 |
| 276.01 to 280.00 | +/- 2.01 | 10.867 to 11.023 | +/- 0.079 |
| 280.01 to 283.00 | +/- 2.03 | 11.024 to 11.141 | +/- 0.080 |
| 283.01 to 286.00 | +/- 2.05 | 11.142 to 11.259 | +/- 0.081 |
| 286.01 to 290.00 | +/- 2.08 | 11.260 to 11.417 | +/- 0.082 |
| 290.01 to 295.00 | +/- 2.11 | 11.418 to 11.614 | +/- 0.083 |
| 295.01 to 300.00 | +/- 2.14 | 11.615 to 11.810 | +/- 0.084 |
| 300.01 to 307.00 | +/- 2.16 | 11.811 to 12.086 | +/- 0.085 |
| 307.01 to 311.00 | +/- 2.21 | 12.087 to 12.243 | +/- 0.087 |
| 311.01 to 315.00 | +/- 2.24 | 12.244 to 12.401 | +/- 0.088 |
| 315.01 to 320.00 | +/- 2.27 | 12.402 to 12.598 | +/- 0.089 |
| 320.01 to 325.00 | +/- 2.30 | 12.599 to 12.795 | +/- 0.091 |
| 325.01 to 330.00 | +/- 2.33 | 12.796 to 12.991 | +/- 0.092 |
| 330.01 to 335.00 | +/- 2.36 | 12.992 to 13.188 | +/- 0.093 |
| 335.01 to 340.00 | +/- 2.40 | 13.189 to 13.385 | +/- 0.094 |
| 340.01 to 345.00 | +/- 2.43 | 13.386 to 13.582 | +/- 0.096 |
| 345.01 to 350.00 | +/- 2.46 | 13.583 to 13.779 | +/- 0.097 |
| 350.01 to 355.00 | +/- 2.49 | 13.780 to 13.976 | +/- 0.098 |
| 355.01 to 360.00 | +/- 2.52 | 13.977 to 14.173 | +/- 0.099 |
| 360.01 to 365.00 | +/- 2.56 | 14.174 to 14.369 | +/- 0.101 |
| 365.01 to 370.00 | +/- 2.59 | 14.370 to 14.566 | +/- 0.102 |
| 370.01 to 375.00 | +/- 2.62 | 14.567 to 14.763 | +/- 0.103 |
| 375.01 to 379.00 | +/- 2.64 | 14.764 to 14.921 | +/- 0.104 |
| 379.01 to 383.00 | +/- 2.67 | 14.922 to 15.078 | +/- 0.105 |
| 383.01 to 387.00 | +/- 2.70 | 15.079 to 15.236 | +/- 0.106 |
| 387.01 to 391.00 | +/- 2.72 | 15.237 to 15.393 | +/- 0.107 |
| 391.01 to 395.00 | +/- 2.75 | 15.394 to 15.551 | +/- 0.108 |
| 395.01 to 400.00 | +/- 2.78 | 15.552 to 15.747 | +/- 0.109 |
| 400.01 to 406.00 | +/- 2.82 | 15.748 to 15.984 | +/- 0.111 |
| 406.01 to 412.00 | +/- 2.85 | 15.985 to 16.220 | +/- 0.112 |
| 412.01 to 418.00 | +/- 2.89 | 16.221 to 16.456 | +/- 0.114 |
| 418.01 to 425.00 | +/- 2.93 | 16.457 to 16.732 | +/- 0.115 |
| 425.01 to 429.00 | +/- 2.96 | 16.733 to 16.889 | +/- 0.117 |
| 429.01 to 433.00 | +/- 2.99 | 16.890 to 17.047 | +/- 0.118 |
| 433.01 to 437.00 | +/- 3.01 | 17.048 to 17.204 | +/- 0.119 |
| 437.01 to 443.00 | +/- 3.05 | 17.205 to 17.716 | +/- 0.120 |
| 450.01 to 456.00 | +/- 3.13 | 17.717 to 17.952 | +/- 0.123 |
| 456.01 to 462.00 | +/- 3.17 | 17.953 to 18.188 | +/- 0.125 |
| 462.01 to 466.00 | +/- 3.19 | 18.189 to 18.346 | +/- 0.126 |
| 466.01 to 470.00 | +/- 3.22 | 18.347 to 18.503 | +/- 0.127 |
| 470.01 to 475.00 | +/- 3.25 | 18.504 to 18.700 | +/- 0.128 |
| 475.01 to 479.00 | +/- 3.28 | 18.701 to 18.858 | +/- 0.129 |
| 479.01 to 483.00 | +/- 3.30 | 18.859 to 19.015 | +/- 0.130 |
| 483.01 to 487.00 | +/- 3.33 | 19.016 to 19 173 | +/- 0.131 |
| 487.01 to 493.00 | +/- 3.36 | 19.174 to 19.409 | +/- 0.132 |
| 493.01 to 500.00 | +/- 3.41 | 19.410 to 19.684 | +/- 0.134 |
| 500.01 to 508.00 | +/- 3.46 | 19.685 to 19.999 | +/- 0.136 |
| 508.01 to 515.00 | +/- 3.50 | 20.000 to 20.275 | +/- 0.138 |
| 515.01 to 523.00 | +/- 3.55 | 20.276 to 20.590 | +/- 0.140 |
| 523.01 to 530.00 | +/- 3.60 | 20.591 to 20.865 | +/- 0.142 |
| 530.01 to 538.00 | +/- 3.65 | 20.866 to 21.180 | +/- 0.144 |
| 538.01 to 545.00 | +/- 3.69 | 21.181 to 21.456 | +/- 0.145 |
| 545.01 to 553.00 | +/- 3.74 | 21.457 to 21.771 | +/- 0.147 |
| 553.01 to 560.00 | +/- 3.78 | 21.772 to 22.047 | +/- 0.149 |
| 560.01 to 570.00 | +/- 3.85 | 22.048 to 22.440 | +/- 0.152 |
| 570.01 to 580.00 | +/- 3.91 | 22.441 to 22.834 | +/- 0.154 |
| 580.01 to 590.00 | +/- 3.97 | 22.835 to 23.228 | +/- 0.156 |
| 590.01 to 600.00 | +/- 4.03 | 23.229 to 23.621 | +/- 0.159 |
| 600.01 to 608.00 | +/- 4.08 | 23.622 to 23.936 | +/- 0.161 |
| 608.01 to 615.00 | +/- 4.12 | 23.937 to 24.212 | +/- 0.162 |
| 615.01 to 623.00 | +/- 4.17 | 24.213 to 24.527 | +/- 0.164 |
| 623.01 to 630.00 | +/- 4.22 | 24.528 to 24.802 | +/- 0.166 |
| 630.01 to 640.00 | +/- 4.28 | 24.803 to 25.196 | +/- 0.169 |
| 640.01 to 650.00 | +/- 4.34 | 25.197 to 25.590 | +/- 0.171 |
| 650.01 to 660.00 | +/- 4.40 | 25.591 to 25.984 | +/- 0.173 |
| 660.01 to 670.00 | +/- 4.47 | 25.985 to 26.378 | +/- 0.176 |
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