O-RING TOLERANCES – GENERAL PURPOSE
30-08-2022
O-Ring Tolerances for Cross Section and Inside Diameter
The o-ring tolerances outlined in the charts below reference general purpose o-rings. Find the right o-ring tolerance for your application and easily order from XST.
For custom o-rings or tight tolerance o-rings, contact us to review the capabilities of your application.
| Inside diameter | Lower | Upper | Inside diameter | Lower | Upper | Inside diameter | Lower | Upper | Inside diameter | Lower | Upper |
| tolerance | tolerance | tolerance | tolerance | tolerance | tolerance | tolerance | tolerance | ||||
| ID(mm) | mm | mm | ID(mm) | mm | mm | ID(mm) | mm | mm | ID(mm) | mm | mm |
| 0.70 - 2.50 | 0.12 | 0.13 | 51.51 - 53.00 | 0.49 | 0.50 | 132.01 - 136.00 | 1.04 | 1.07 | 345.01 - 355.00 | 2.43 | 2.49 |
| 2.51 - 4.50 | 0.13 | 0.15 | 53.01 - 54.50 | 0.50 | 0.51 | 136.01 - 140.00 | 1.07 | 1.09 | 355.01 - 365.00 | 2.49 | 2.56 |
| 4.51 - 6.30 | 0.15 | 0.16 | 54.51 - 56.00 | 0.51 | 0.52 | 140.01 - 145.00 | 1.09 | 1.13 | 365.01 - 375.00 | 2.56 | 2.62 |
| 6.31 - 8.50 | 0.16 | 0.18 | 56.01 - 58.00 | 0.52 | 0.54 | 145.01 - 150.00 | 1.13 | 1.16 | 375.01 - 387.00 | 2.62 | 2.70 |
| 8.51 - 10.00 | 0.18 | 0.19 | 58.01 - 60.00 | 0.54 | 0.55 | 150.01 - 155.00 | 1.16 | 1.19 | 387.01 - 400.00 | 2.70 | 2.78 |
| 10.01 - 11.20 | 0.19 | 0.20 | 60.01 - 61.50 | 0.55 | 0.56 | 155.01 - 160.00 | 1.19 | 1.23 | 400.01 - 412.00 | 2.78 | 2.85 |
| 11.21 - 14.00 | 0.20 | 0.22 | 61.51 - 63.00 | 0.56 | 0.57 | 160.01 - 165.00 | 1.23 | 1.26 | 412.01 - 425.00 | 2.85 | 2.94 |
| 14.01 - 16.00 | 0.22 | 0.24 | 63.01 - 65.00 | 0.57 | 0.58 | 165.01 - 170.00 | 1.26 | 1.29 | 425.01 - 437.00 | 2.94 | 3.01 |
| 16.01 - 18.00 | 0.24 | 0.25 | 65.01 - 67.00 | 0.58 | 0.60 | 170.01 - 175.00 | 1.29 | 1.33 | 437.01 - 450.00 | 3.01 | 3.09 |
| 18.01 - 20.00 | 0.25 | 0.26 | 67.01 - 69.00 | 0.60 | 0.61 | 175.01 - 180.00 | 1.33 | 1.36 | 450.01 - 462.00 | 3.09 | 3.17 |
| 20.01 - 21.20 | 0.27 | 0.27 | 69.01 - 71.00 | 0.61 | 0.63 | 180.01 - 185.00 | 1.36 | 1.39 | 462.01 - 475.00 | 3.17 | 3.25 |
| 21.21 - 23.60 | 0.27 | 0.29 | 71.01 - 73.00 | 0.63 | 0.64 | 185.01 - 190.00 | 1.39 | 1.43 | 475.01 - 487.00 | 3.25 | 3.33 |
| 23.61 - 25.00 | 0.29 | 0.30 | 73.01 - 75.00 | 0.64 | 0.65 | 190.01 - 195.00 | 1.43 | 1.46 | 487.01 - 500.00 | 3.33 | 3.41 |
| 25.01 - 26.50 | 0.30 | 0.31 | 75.01 - 77.50 | 0.65 | 0.67 | 195.01 - 200.00 | 1.46 | 1.49 | 500.01 - 515.00 | 3.41 | 3.50 |
| 26.51 - 28.00 | 0.31 | 0.32 | 77.51 - 80.00 | 0.67 | 0.69 | 200.01 - 206.00 | 1.49 | 1.53 | 515.01 - 530.00 | 3.50 | 3.60 |
| 28.01 - 30.00 | 0.32 | 0.34 | 80.01 - 82.50 | 0.69 | 0.71 | 206.01 - 212.00 | 1.53 | 1.57 | 530.01 - 545.00 | 3.60 | 3.69 |
| 30.01 - 31.50 | 0.34 | 0.35 | 82.51 - 85.00 | 0.71 | 0.72 | 212.01 - 218.00 | 1.57 | 1.61 | 545.01 - 560.00 | 3.69 | 3.78 |
| 31.51 - 33.50 | 0.35 | 0.36 | 85.01 - 87.50 | 0.72 | 0.74 | 218.01 - 224.00 | 1.61 | 1.65 | 560.01 - 580.00 | 3.78 | 3.91 |
| 33.51 - 34.50 | 0.36 | 0.37 | 87.51 - 90.00 | 0.74 | 0.76 | 224.01 - 230.00 | 1.65 | 1.69 | 580.01 - 600.00 | 3.91 | 4.03 |
| 34.51 - 35.50 | 0.37 | 0.38 | 90.01 - 92.50 | 0.76 | 0.77 | 230.01 - 236.00 | 1.69 | 1.73 | 600.01 - 615.00 | 4.03 | 4.12 |
| 35.51 - 36.50 | 0.38 | 0.38 | 92.51 - 95.00 | 0.77 | 0.79 | 236.01 - 243.00 | 1.73 | 1.77 | 615.01 - 630.00 | 4.12 | 4.22 |
| 36.51 - 37.50 | 0.38 | 0.39 | 95.01 - 97.50 | 0.79 | 0.81 | 243.01 - 250.00 | 1.77 | 1.82 | 630.01 - 650.00 | 4.22 | 4.34 |
| 37.51 - 38.70 | 0.39 | 0.40 | 97.51 - 100.00 | 0.81 | 0.82 | 250.01 - 258.00 | 1.82 | 1.87 | 650.01 - 670.00 | 4.34 | 4.47 |
| 38.71 - 40.00 | 0.40 | 0.41 | 100.01 - 103.00 | 0.82 | 0.85 | 258.01 - 265.00 | 1.87 | 1.91 | 671 | 4.47 | |
| 40.01 - 41.20 | 0.41 | 0.42 | 103.01 - 106.00 | 0.85 | 0.87 | 265.01 - 272.00 | 1.91 | 1.96 | 700 | 4.65 | |
| 41.21 - 42.50 | 0.42 | 0.43 | 106.01 - 109.00 | 0.87 | 0.89 | 272.01 - 280.00 | 1.96 | 2.01 | 750 | 4.96 | |
| 42.51 - 43.70 | 0.43 | 0.44 | 109.01 - 112.00 | 0.89 | 0.91 | 280.01 - 290.00 | 2.01 | 2.08 | 800 | 5.26 | |
| 43.71 - 45.00 | 0.44 | 0.44 | 112.01 - 115.00 | 0.91 | 0.93 | 290.01 - 300.00 | 2.08 | 2.14 | 850 | 5.57 | |
| 45.01 - 46.20 | 0.44 | 0.45 | 115.01 - 118.00 | 0.93 | 0.95 | 300.01 - 307.00 | 2.14 | 2.19 | 900 | 5.87 | |
| 46.21 - 47.50 | 0.45 | 0.46 | 118.01 - 122.00 | 0.95 | 0.97 | 307.01 - 315.00 | 2.19 | 2.24 | 1000 | 6.48 | |
| 47.51 - 48.70 | 0.46 | 0.47 | 122.01 - 125.00 | 0.97 | 0.99 | 315.01 - 325.00 | 2.24 | 2.30 | |||
| 48.71 - 50.00 | 0.47 | 0.48 | 125.01 - 128.00 | 0.99 | 1.01 | 325.01 - 335.00 | 2.30 | 2.36 | |||
| 50.01 - 51.50 | 0.48 | 0.49 | 128.01 - 132.00 | 1.01 | 1.04 | 335.01 - 345.00 | 2.36 | 2.43 |
Permissible deviations for O-Ring cross-sections according to ISO 3601:2008
For general industrial applications ( Standardized O-Rings)
| Cross Section (mm) | 1.02 | 1.27 | 1.52 | 1.78 | 2.62 | 3.53 | 5.33 | 6.99 |
| Permitted Deviations ± | 0.08 | 0.08 | 0.08 | 0.08 | 0.09 | 0.10 | 0.13 | 0.15 |
For general industrial applications (Not standardized O-Rings)
| Cross Section (mm) | 0.80 < d2 ≤ 2.25 | 2.25 < d2 ≤ 3.15 | 3.15 < d2 ≤ 4.50 | 4.50 < d2 ≤ 6.30 | 6.30 < d2 ≤ 8.40 |
| Permitted Deviations ± | 0.08 | 0.09 | 0.10 | 0.13 | 0.15 |