O-Ring Tools
O-ring tolerances
Calculate manufacturing tolerances and look up complete tolerance lists—all on one page. Values according to ISO 3601.
← All O-Ring ToolsCalculate Tolerance
Inner diameter d1
mm
Tolerance± 0.19 mm
Maximum10.19 mm
Minimum9.81 mm
Cord thickness d2
mm
Tolerance± 0.09 mm
Maximum3.09 mm
Minimum2.91 mm
Standard (ISO 3601): for FFKM (ECOLAST), FKM, PTFE, NBR, HNBR, EPDM, silicone, FVMQ, FEPM, CR, and ACM.
ISO 3601
If the manufactured O-ring falls between the minimum and maximum dimensions, it complies with the ISO 3601 guidelines. For FEP-coated O-rings, the standard market quality standard applies. All values are subject to change.
Complete Tolerance Lists
Cord thickness d₂
| From Ø (mm) | To Ø (mm) | Tolerance (mm) |
|---|---|---|
| 0.80 | 2.25 | ± 0.08 |
| 2.25 | 3.15 | ± 0.09 |
| 3.15 | 4.50 | ± 0.10 |
| 4.50 | 6.30 | ± 0.13 |
| 6.30 | 8.40 | ± 0.15 |
| 8.40 | 10.00 | ± 0.21 |
| 10.00 | 12.00 | ± 0.25 |
No section found.
Inner diameter d₁
| From Ø (mm) | To Ø (mm) | Tolerance (mm) |
|---|---|---|
| 0.00 | 1.72 | ± 0.12 |
| 1.72 | 2.93 | ± 0.13 |
| 2.93 | 4.17 | ± 0.14 |
| 4.17 | 5.44 | ± 0.15 |
| 5.44 | 6.72 | ± 0.16 |
| 6.72 | 8.01 | ± 0.17 |
| 8.01 | 9.31 | ± 0.18 |
| 9.31 | 10.62 | ± 0.19 |
| 10.62 | 11.94 | ± 0.20 |
| 11.94 | 13.27 | ± 0.21 |
| 13.27 | 14.61 | ± 0.22 |
| 14.61 | 15.95 | ± 0.23 |
| 15.95 | 17.29 | ± 0.24 |
| 17.29 | 18.64 | ± 0.25 |
| 18.64 | 20.00 | ± 0.26 |
| 20.00 | 21.36 | ± 0.27 |
| 21.36 | 22.73 | ± 0.28 |
| 22.73 | 24.10 | ± 0.29 |
| 24.10 | 25.47 | ± 0.30 |
| 25.47 | 26.85 | ± 0.31 |
| 26.85 | 28.23 | ± 0.32 |
| 28.23 | 29.61 | ± 0.33 |
| 29.61 | 31.00 | ± 0.34 |
| 31.00 | 32.39 | ± 0.35 |
| 32.39 | 33.78 | ± 0.36 |
| 33.78 | 35.18 | ± 0.37 |
| 35.18 | 36.58 | ± 0.38 |
| 36.58 | 37.98 | ± 0.39 |
| 37.98 | 39.38 | ± 0.40 |
| 39.38 | 40.79 | ± 0.41 |
| 40.79 | 42.20 | ± 0.42 |
| 42.20 | 43.61 | ± 0.43 |
| 43.61 | 45.02 | ± 0.44 |
| 45.02 | 46.44 | ± 0.45 |
| 46.44 | 47.86 | ± 0.46 |
| 47.86 | 49.28 | ± 0.47 |
| 49.28 | 50.70 | ± 0.48 |
| 50.70 | 52.12 | ± 0.49 |
| 52.12 | 53.55 | ± 0.50 |
| 53.55 | 54.98 | ± 0.51 |
| 54.98 | 56.41 | ± 0.52 |
| 56.41 | 57.84 | ± 0.53 |
| 57.84 | 59.27 | ± 0.54 |
| 59.27 | 60.71 | ± 0.55 |
| 60.71 | 62.14 | ± 0.56 |
| 62.14 | 63.58 | ± 0.57 |
| 63.58 | 65.02 | ± 0.58 |
| 65.02 | 66.47 | ± 0.59 |
| 66.47 | 67.91 | ± 0.60 |
| 67.91 | 69.35 | ± 0.61 |
| 69.35 | 70.80 | ± 0.62 |
| 70.80 | 72.25 | ± 0.63 |
| 72.25 | 73.70 | ± 0.64 |
| 73.70 | 75.15 | ± 0.65 |
| 75.15 | 76.60 | ± 0.66 |
| 76.60 | 78.05 | ± 0.67 |
| 78.05 | 79.51 | ± 0.68 |
| 79.51 | 80.97 | ± 0.69 |
| 80.97 | 82.42 | ± 0.70 |
| 82.42 | 83.88 | ± 0.71 |
| 83.88 | 85.34 | ± 0.72 |
| 85.34 | 86.80 | ± 0.73 |
| 86.80 | 88.27 | ± 0.74 |
| 88.27 | 89.73 | ± 0.75 |
| 89.73 | 91.20 | ± 0.76 |
| 91.20 | 92.66 | ± 0.77 |
| 92.66 | 94.13 | ± 0.78 |
| 94.13 | 95.60 | ± 0.79 |
| 95.60 | 97.07 | ± 0.80 |
| 97.07 | 98.54 | ± 0.81 |
| 98.54 | 100.01 | ± 0.82 |
| 100.01 | 101.48 | ± 0.83 |
| 101.48 | 102.96 | ± 0.84 |
| 102.96 | 104.43 | ± 0.85 |
| 104.43 | 105.91 | ± 0.86 |
| 105.91 | 107.39 | ± 0.87 |
| 107.39 | 108.86 | ± 0.88 |
| 108.86 | 110.34 | ± 0.89 |
| 110.34 | 111.82 | ± 0.90 |
| 111.82 | 113.30 | ± 0.91 |
| 113.30 | 114.79 | ± 0.92 |
| 114.79 | 116.27 | ± 0.93 |
| 116.27 | 117.75 | ± 0.94 |
| 117.75 | 119.24 | ± 0.95 |
| 119.24 | 120.72 | ± 0.96 |
| 120.72 | 122.21 | ± 0.97 |
| 122.21 | 123.70 | ± 0.98 |
| 123.70 | 125.19 | ± 0.99 |
| 125.19 | 126.68 | ± 1.00 |
| 126.68 | 128.17 | ± 1.01 |
| 128.17 | 129.66 | ± 1.02 |
| 129.66 | 131.15 | ± 1.03 |
| 131.15 | 132.64 | ± 1.04 |
| 132.64 | 134.14 | ± 1.05 |
| 134.14 | 135.63 | ± 1.06 |
| 135.63 | 137.13 | ± 1.07 |
| 137.13 | 138.62 | ± 1.08 |
| 138.62 | 140.12 | ± 1.09 |
| 140.12 | 141.62 | ± 1.10 |
| 141.62 | 143.12 | ± 1.11 |
| 143.12 | 144.62 | ± 1.12 |
| 144.62 | 146.12 | ± 1.13 |
| 146.12 | 147.62 | ± 1.14 |
| 147.62 | 149.12 | ± 1.15 |
| 149.12 | 150.62 | ± 1.16 |
| 150.62 | 152.13 | ± 1.17 |
| 152.13 | 153.63 | ± 1.18 |
| 153.63 | 155.13 | ± 1.19 |
| 155.13 | 156.64 | ± 1.20 |
| 156.64 | 158.15 | ± 1.21 |
| 158.15 | 159.65 | ± 1.22 |
| 159.65 | 161.16 | ± 1.23 |
| 161.16 | 162.67 | ± 1.24 |
| 162.67 | 164.18 | ± 1.25 |
| 164.18 | 165.69 | ± 1.28 |
| 165.69 | 167.20 | ± 1.29 |
| 167.20 | 168.71 | ± 1.30 |
| 168.71 | 170.22 | ± 1.31 |
| 170.22 | 171.73 | ± 1.32 |
| 171.73 | 173.25 | ± 1.33 |
| 173.25 | 174.76 | ± 1.34 |
| 174.76 | 176.28 | ± 1.35 |
| 176.28 | 177.79 | ± 1.36 |
| 177.79 | 179.31 | ± 1.37 |
| 179.31 | 180.82 | ± 1.38 |
| 180.82 | 182.34 | ± 1.39 |
| 182.34 | 183.86 | ± 1.40 |
| 183.86 | 185.38 | ± 1.41 |
| 185.38 | 186.89 | ± 1.42 |
| 186.89 | 188.41 | ± 1.43 |
| 188.41 | 189.93 | ± 1.44 |
| 189.93 | 191.45 | ± 1.45 |
| 191.45 | 192.98 | ± 1.46 |
| 192.98 | 194.50 | ± 1.47 |
| 194.50 | 196.02 | ± 1.48 |
| 196.02 | 197.54 | ± 1.49 |
| 197.54 | 199.07 | ± 1.50 |
| 199.07 | 200.59 | ± 1.51 |
| 200.59 | 202.12 | ± 1.52 |
| 202.12 | 203.64 | ± 1.53 |
| 203.64 | 205.17 | ± 1.54 |
| 205.17 | 206.69 | ± 1.55 |
| 206.69 | 208.22 | ± 1.56 |
| 208.22 | 209.75 | ± 1.57 |
| 209.75 | 211.28 | ± 1.58 |
| 211.28 | 212.81 | ± 1.59 |
| 212.81 | 214.34 | ± 1.60 |
| 214.34 | 215.87 | ± 1.61 |
| 215.87 | 217.40 | ± 1.62 |
| 217.40 | 218.93 | ± 1.63 |
| 218.93 | 220.46 | ± 1.64 |
| 220.46 | 221.99 | ± 1.65 |
| 221.99 | 223.52 | ± 1.66 |
| 223.52 | 225.06 | ± 1.67 |
| 225.06 | 226.59 | ± 1.68 |
| 226.59 | 228.12 | ± 1.69 |
| 228.12 | 229.66 | ± 1.70 |
| 229.66 | 231.19 | ± 1.71 |
| 231.19 | 232.73 | ± 1.72 |
| 232.73 | 235.80 | ± 1.73 |
| 235.80 | 237.34 | ± 1.74 |
| 237.34 | 238.88 | ± 1.75 |
| 238.88 | 240.42 | ± 1.76 |
| 240.42 | 241.95 | ± 1.77 |
| 241.95 | 243.49 | ± 1.78 |
| 243.49 | 245.03 | ± 1.79 |
| 245.03 | 246.57 | ± 1.80 |
| 246.57 | 248.11 | ± 1.81 |
| 248.11 | 249.66 | ± 1.82 |
| 249.66 | 251.20 | ± 1.82 |
| 251.20 | 252.74 | ± 1.83 |
| 252.74 | 254.28 | ± 1.84 |
| 254.28 | 255.82 | ± 1.85 |
| 255.82 | 257.37 | ± 1.86 |
| 257.37 | 258.91 | ± 1.87 |
| 258.91 | 260.46 | ± 1.88 |
| 260.46 | 262.00 | ± 1.89 |
| 262.00 | 263.55 | ± 1.90 |
| 263.55 | 265.09 | ± 1.91 |
| 265.09 | 266.64 | ± 1.92 |
| 266.64 | 268.18 | ± 1.93 |
| 268.18 | 269.73 | ± 1.94 |
| 269.73 | 271.28 | ± 1.95 |
| 271.28 | 272.83 | ± 1.96 |
| 272.83 | 274.38 | ± 1.97 |
| 274.38 | 275.92 | ± 1.98 |
| 275.92 | 277.47 | ± 1.99 |
| 277.47 | 279.02 | ± 2.00 |
| 279.02 | 280.57 | ± 2.01 |
| 280.57 | 282.12 | ± 2.02 |
| 282.12 | 283.68 | ± 2.03 |
| 283.68 | 285.23 | ± 2.04 |
| 285.23 | 286.78 | ± 2.05 |
| 286.78 | 288.33 | ± 2.06 |
| 288.33 | 289.88 | ± 2.07 |
| 289.88 | 291.44 | ± 2.08 |
| 291.44 | 292.99 | ± 2.09 |
| 292.99 | 294.54 | ± 2.10 |
| 294.54 | 296.10 | ± 2.11 |
| 296.10 | 297.65 | ± 2.12 |
| 297.65 | 299.21 | ± 2.13 |
| 299.21 | 300.76 | ± 2.14 |
| 300.76 | 302.32 | ± 2.15 |
| 302.32 | 303.88 | ± 2.16 |
| 303.88 | 305.43 | ± 2.17 |
| 305.43 | 306.99 | ± 2.18 |
| 306.99 | 308.55 | ± 2.19 |
| 308.55 | 310.11 | ± 2.20 |
| 310.11 | 311.66 | ± 2.21 |
| 311.66 | 313.22 | ± 2.22 |
| 313.22 | 314.78 | ± 2.23 |
| 314.78 | 316.34 | ± 2.24 |
| 316.34 | 317.90 | ± 2.25 |
| 317.90 | 319.46 | ± 2.26 |
| 319.46 | 321.02 | ± 2.27 |
| 321.02 | 322.58 | ± 2.28 |
| 322.58 | 324.15 | ± 2.29 |
| 324.15 | 325.71 | ± 2.30 |
| 325.71 | 327.27 | ± 2.31 |
| 327.27 | 328.83 | ± 2.32 |
| 328.83 | 330.39 | ± 2.33 |
| 330.39 | 331.96 | ± 2.34 |
| 331.96 | 333.52 | ± 2.35 |
| 333.52 | 336.65 | ± 2.36 |
| 336.65 | 338.21 | ± 2.37 |
| 338.21 | 339.78 | ± 2.38 |
| 339.78 | 341.35 | ± 2.39 |
| 341.35 | 342.91 | ± 2.40 |
| 342.91 | 344.48 | ± 2.41 |
| 344.48 | 346.04 | ± 2.42 |
| 346.04 | 347.61 | ± 2.43 |
| 347.61 | 349.18 | ± 2.44 |
| 349.18 | 350.75 | ± 2.45 |
| 350.75 | 352.31 | ± 2.46 |
| 352.31 | 353.88 | ± 2.47 |
| 353.88 | 355.45 | ± 2.48 |
| 355.45 | 357.02 | ± 2.49 |
| 357.02 | 358.59 | ± 2.50 |
| 358.59 | 360.16 | ± 2.51 |
| 360.16 | 361.73 | ± 2.52 |
| 361.73 | 363.30 | ± 2.53 |
| 363.30 | 364.87 | ± 2.54 |
| 364.87 | 366.44 | ± 2.55 |
| 366.44 | 368.01 | ± 2.56 |
| 368.01 | 369.58 | ± 2.57 |
| 369.58 | 371.16 | ± 2.58 |
| 371.16 | 374.30 | ± 2.59 |
| 374.30 | 375.87 | ± 2.60 |
| 375.87 | 377.45 | ± 2.61 |
| 377.45 | 379.02 | ± 2.62 |
| 379.02 | 380.59 | ± 2.63 |
| 380.59 | 382.17 | ± 2.64 |
| 382.17 | 383.74 | ± 2.65 |
| 383.74 | 385.32 | ± 2.66 |
| 385.32 | 386.89 | ± 2.67 |
| 386.89 | 388.47 | ± 2.68 |
| 388.47 | 390.05 | ± 2.69 |
| 390.05 | 391.62 | ± 2.70 |
| 391.62 | 393.20 | ± 2.71 |
| 393.20 | 394.78 | ± 2.72 |
| 394.78 | 396.35 | ± 2.73 |
| 396.35 | 397.93 | ± 2.74 |
| 397.93 | 399.51 | ± 2.75 |
| 399.51 | 401.09 | ± 2.76 |
| 401.09 | 402.66 | ± 2.77 |
| 402.66 | 404.24 | ± 2.78 |
| 404.24 | 405.82 | ± 2.79 |
| 405.82 | 407.40 | ± 2.80 |
| 407.40 | 408.98 | ± 2.82 |
| 408.98 | 410.56 | ± 2.84 |
| 410.56 | 412.14 | ± 2.85 |
| 412.14 | 413.72 | ± 2.86 |
| 413.72 | 415.30 | ± 2.87 |
| 415.30 | 416.89 | ± 2.88 |
| 416.89 | 418.47 | ± 2.89 |
| 418.47 | 420.05 | ± 2.90 |
| 420.05 | 421.63 | ± 2.91 |
| 421.63 | 423.21 | ± 2.92 |
| 423.21 | 424.80 | ± 2.93 |
| 424.80 | 426.38 | ± 2.94 |
| 426.38 | 427.96 | ± 2.95 |
| 427.96 | 429.55 | ± 2.96 |
| 429.55 | 431.13 | ± 2.97 |
| 431.13 | 432.71 | ± 2.98 |
| 432.71 | 434.30 | ± 2.99 |
| 434.30 | 435.88 | ± 3.00 |
| 435.88 | 437.47 | ± 3.01 |
| 437.47 | 439.05 | ± 3.02 |
| 439.05 | 440.64 | ± 3.03 |
| 440.64 | 442.22 | ± 3.04 |
| 442.22 | 443.81 | ± 3.05 |
| 443.81 | 445.40 | ± 3.06 |
| 445.40 | 446.98 | ± 3.07 |
| 446.98 | 448.57 | ± 3.08 |
| 448.57 | 450.16 | ± 3.09 |
| 450.16 | 451.75 | ± 3.10 |
| 451.75 | 456.51 | ± 3.11 |
| 456.51 | 458.10 | ± 3.14 |
| 458.10 | 459.69 | ± 3.15 |
| 459.69 | 461.28 | ± 3.16 |
| 461.28 | 462.87 | ± 3.17 |
| 462.87 | 464.46 | ± 3.18 |
| 464.46 | 466.05 | ± 3.19 |
| 466.05 | 467.64 | ± 3.20 |
| 467.64 | 469.23 | ± 3.21 |
| 469.23 | 470.82 | ± 3.22 |
| 470.82 | 472.41 | ± 3.23 |
| 472.41 | 474.00 | ± 3.24 |
| 474.00 | 475.59 | ± 3.25 |
| 475.59 | 477.19 | ± 3.26 |
| 477.19 | 478.78 | ± 3.27 |
| 478.78 | 480.37 | ± 3.28 |
| 480.37 | 481.96 | ± 3.29 |
| 481.96 | 483.56 | ± 3.30 |
| 483.56 | 485.15 | ± 3.31 |
| 485.15 | 486.74 | ± 3.32 |
| 486.74 | 488.34 | ± 3.33 |
| 488.34 | 489.93 | ± 3.34 |
| 489.93 | 491.52 | ± 3.45 |
| 491.52 | 493.12 | ± 3.46 |
| 493.12 | 494.71 | ± 3.47 |
| 494.71 | 496.31 | ± 3.48 |
| 496.31 | 497.90 | ± 3.49 |
| 497.90 | 499.50 | ± 3.50 |
| 499.50 | 501.10 | ± 3.51 |
| 501.10 | 502.69 | ± 3.52 |
| 502.69 | 504.29 | ± 3.53 |
| 504.29 | 505.89 | ± 3.54 |
| 505.89 | 507.48 | ± 3.55 |
| 507.48 | 509.08 | ± 3.56 |
| 509.08 | 510.68 | ± 3.57 |
| 510.68 | 512.27 | ± 3.58 |
| 512.27 | 513.87 | ± 3.59 |
| 513.87 | 515.47 | ± 3.60 |
| 515.47 | 517.07 | ± 3.61 |
| 517.07 | 518.67 | ± 3.62 |
| 518.67 | 520.27 | ± 3.63 |
| 520.27 | 521.87 | ± 3.64 |
| 521.87 | 523.46 | ± 3.65 |
| 523.46 | 525.06 | ± 3.66 |
| 525.06 | 526.66 | ± 3.67 |
| 526.66 | 528.26 | ± 3.68 |
| 528.26 | 529.86 | ± 3.69 |
| 529.86 | 531.46 | ± 3.70 |
| 531.46 | 533.07 | ± 3.71 |
| 533.07 | 534.67 | ± 3.72 |
| 534.67 | 536.27 | ± 3.73 |
| 536.27 | 537.87 | ± 3.74 |
| 537.87 | 539.47 | ± 3.75 |
| 539.47 | 541.07 | ± 3.76 |
| 541.07 | 542.68 | ± 3.77 |
| 542.68 | 544.28 | ± 3.78 |
| 544.28 | 545.88 | ± 3.79 |
| 545.88 | 547.48 | ± 3.80 |
| 547.48 | 549.09 | ± 3.81 |
| 549.09 | 550.69 | ± 3.82 |
| 550.69 | 552.29 | ± 3.83 |
| 552.29 | 553.90 | ± 3.84 |
| 553.90 | 555.50 | ± 3.85 |
| 555.50 | 577.11 | ± 3.86 |
| 577.11 | 600.00 | ± 4.03 |
| 600.00 | 700.00 | ± 4.65 |
| 700.00 | 800.00 | ± 5.26 |
| 800.00 | 900.00 | ± 5.87 |
| 900.00 | 1,000.00 | ± 6.48 |
| 1,000.00 | 1,200.00 | ± 7.69 |
| 1,200.00 | 1,400.00 | ± 8.88 |
| 1,400.00 | 1,600.00 | ± 10.07 |
| 1,600.00 | 1,800.00 | ± 11.25 |
| 1,800.00 | 2,000.00 | ± 12.42 |
No section found.
The range applies from "From Ø" (inclusive) to "To Ø" (exclusive). All values are in mm and are not binding; errors excepted. FEP/PFA values comply with standard market quality standards.
Good to Know
What tolerance is calculated?
The manufacturing tolerance of an O-ring is calculated. If the finished O-ring falls within the maximum and minimum values, it complies with the ISO 3601 standards.
Which variant is best for which material?
Standard (ISO 3601): FFKM (ECOLAST), FKM, PTFE, NBR, HNBR, EPDM, silicone, FVMQ, FEPM, CR, ACM. FEP-coated: FEP- and PFA-coated O-rings.
Why do FEP O-rings have their own calculation?
The manufacture of FEP-coated O-rings is significantly more challenging than that of standard O-rings in accordance with ISO 3601. Therefore, separate, slightly wider tolerances apply. There is no universally applicable standard table for this; instead, the quality standard customary in the market applies.
Where do these values come from?
The standard values are based on the international O-ring standard ISO 3601-1 (Class B). The FEP values comply with the standard quality requirements in the market.
Disclaimer, Errors, and Changes
We reserve the right to make corrections and changes. The values provided are not binding and are intended as recommendations. If you have any specific questions, please contact us at info@nh-oring.de.
Questions about tolerances or custom dimensions?
Please send us your dimensions and the desired material. We will check feasibility and tolerances, with no minimum order quantity and no tooling costs.