O-Ring Tools
O-Ring Tolerances
Calculate manufacturing tolerance and look up complete tolerance lists, all on one page. Values per ISO 3601.
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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 lies between the minimum and maximum dimension, it meets the guidelines of ISO 3601. For FEP-encapsulated O-rings the customary market quality standard applies. All values non-binding.
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 range 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 | 1000.00 | ± 6.48 |
| 1000.00 | 1200.00 | ± 7.69 |
| 1200.00 | 1400.00 | ± 8.88 |
| 1400.00 | 1600.00 | ± 10.07 |
| 1600.00 | 1800.00 | ± 11.25 |
| 1800.00 | 2000.00 | ± 12.42 |
No range found.
Range applies from and including "From Ø" up to but excluding "To Ø". All values in mm and non-binding, errors excepted. FEP/PFA values per customary market quality standard.
Good to know
Which tolerance is calculated?
The manufacturing tolerance of an O-ring is calculated. If the finished O-ring lies within the maximum and minimum values, it meets the guidelines of ISO 3601.
Which variant for which material?
Standard (ISO 3601): FFKM (ECOLAST), FKM, PTFE, NBR, HNBR, EPDM, silicone, FVMQ, FEPM, CR, ACM. FEP-encapsulated: FEP and PFA encapsulated O-rings.
Why do FEP O-rings have their own calculation?
Manufacturing FEP-encapsulated O-rings is considerably more demanding than standard O-rings per ISO 3601. Therefore separate, slightly larger tolerances apply. There is no universally valid standard table for this; the customary market quality standard applies here.
Where do the values come from?
The standard values are based on the international O-ring standard ISO 3601-1 (class B). The FEP values correspond to the customary market quality standard.
Disclaimer, errors and changes
Errors and changes excepted. The stated values are non-binding and serve as a recommendation. For more detailed questions reach us at info@nh-oring.de.
Questions about tolerance or a special size?
Send us your dimensions and the desired material. We check feasibility and tolerances, with no minimum order and no tooling costs.