ISO 3601 O-Ring Sizes

The International Standards Organisation (ISO) standard, ISO 3601 comprehensively defines both the o-ring and hardware dimensions for rod, piston, face seal grooves.

Size references have been modified to match BS1806 and AS568, however there are two tolerance standards in existance that do not necessarily match

This standard also includes groove recommendations for staic, hydraulic and pneumatic applications

ISO3601 SizeID (mm)ID Tol' (+/- mm)CS (mm)CS Tol' (mm)ID (inch)ID Tol' (+/- inch)CS (inch)CS Tol' (inch)
ISO3601 -004 1.78 0.13 1.78 0.08 0.070 0.005 0.070 0.003
ISO3601 -005 2.57 0.101
ISO3601 -006 2.9 0.114
ISO3601 -007 3.69 0.145
ISO3601 -008 4.47 0.176
ISO3601 -009 5.28 0.208
ISO3601 -010 6.07 0.239
ISO3601 -011 7.66 0.302
ISO3601 -012 9.25 0.364
ISO3601 -013 10.82 0.426
ISO3601 -014 12.42 0.489
ISO3601 -015 14 0.18 0.551 0.007
ISO3601 -016 15.6 0.23 0.614 0.009
ISO3601 -017 17.16 0.676
ISO3601 -018 18.77 0.739
ISO3601 -019 20.35 0.801
ISO3601 -020 21.95 0.864
ISO3601 -021 23.52 0.926
ISO3601 -022 25.12 0.25 0.989 0.010
ISO3601 -023 26.7 1.051
ISO3601 -024 28.3 1.114
ISO3601 -025 29.87 0.28 1.176 0.011
ISO3601 -026 31.47 1.239
ISO3601 -027 33.05 1.301
ISO3601 -028 34.65 0.33 1.364 0.013
ISO3601 -029 37.82 1.489
ISO3601 -030 41 1.614
ISO3601 -031 44.17 0.38 1.739 0.015
ISO3601 -032 47.37 1.865
ISO3601 -033 50.52 0.46 1.989 0.018
ISO3601 -034 53.67 2.113
ISO3601 -035 56.87 2.239
ISO3601 -036 60.04 2.364
ISO3601 -037 63.22 2.489
ISO3601 -040 72.76 0.51 2.865 0.020
ISO3601 -041 75.94 0.61 2.990 0.024
ISO3601 -042 82.28 3.239
ISO3601 -043 88.64 3.490
ISO3601 -044 95 0.69 3.740 0.027
ISO3601 -045 101.34 3.990
ISO3601 -046 107.7 0.76 4.240 0.030
ISO3601 -047 114 4.488
ISO3601 -048 120.4 4.740
ISO3601 -049 126.76 0.94 4.991 0.037
ISO3601 -050 133.1 5.240
ISO3601 -102 1.24 0.1 2.62 0.049 0.004 0.103
ISO3601 -103 2.06 0.13 0.081 0.005
ISO3601 -104 2.84 0.112
ISO3601 -105 3.63 0.143
ISO3601 -106 4.42 0.174
ISO3601 -107 5.23 0.206
ISO3601 -108 6.02 0.237
ISO3601 -109 7.6 0.299
ISO3601 -110 9.19 0.362
ISO3601 -111 10.78 0.424
ISO3601 -112 12.37 0.487
ISO3601 -113 13.95 0.18 0.549 0.007
ISO3601 -114 15.54 0.23 0.612 0.009
ISO3601 -115 17.13 0.674
ISO3601 -116 18.72 0.737
ISO3601 -117 20.29 0.25 0.799 0.010
ISO3601 -118 21.9 0.862
ISO3601 -119 23.47 0.924
ISO3601 -120 25.07 0.987
ISO3601 -121 26.65 1.049
ISO3601 -122 28.25 1.112
ISO3601 -123 29.83 0.3 1.174 0.012
ISO3601 -124 31.42 1.237
ISO3601 -125 33 1.299
ISO3601 -126 34.6 1.362
ISO3601 -127 36.17 1.424
ISO3601 -128 37.77 1.487
ISO3601 -129 39.35 0.38 1.549 0.015
ISO3601 -130 40.95 1.612
ISO3601 -131 42.52 1.674
ISO3601 -132 44.12 1.737
ISO3601 -133 45.7 1.799
ISO3601 -134 47.3 0.43 1.862 0.017
ISO3601 -135 48.9 1.925
ISO3601 -136 50.47 1.987
ISO3601 -137 52.07 2.050
ISO3601 -138 53.65 2.112
ISO3601 -139 55.25 2.175
ISO3601 -140 56.82 2.237
ISO3601 -141 58.42 0.51 2.300 0.020
ISO3601 -142 60 2.362
ISO3601 -143 61.6 2.425
ISO3601 -144 63.17 2.487
ISO3601 -145 64.77 2.550
ISO3601 -146 66.35 2.612
ISO3601 -147 67.95 0.56 2.675 0.022
ISO3601 -148 69.52 2.737
ISO3601 -149 71.12 2.800
ISO3601 -150 72.7 2.862
ISO3601 -151 75.88 0.61 2.987 0.024
ISO3601 -152 82.22 3.237
ISO3601 -153 88.58 3.487
ISO3601 -154 94.93 0.71 3.737 0.028
ISO3601 -155 101.28 3.987
ISO3601 -156 107.63 0.76 4.237 0.030
ISO3601 -157 113.98 4.487
ISO3601 -158 120.33 4.737
ISO3601 -159 126.67 0.89 4.987 0.035
ISO3601 -160 133 5.236
ISO3601 -161 139.38 5.487
ISO3601 -162 145.73 5.737
ISO3601 -163 152.07 5.987
ISO3601 -164 158.43 1.02 6.237 0.040
ISO3601 -165 164.78 6.487
ISO3601 -166 171.13 6.737
ISO3601 -167 177.48 6.987
ISO3601 -168 183.83 1.14 7.237 0.045
ISO3601 -169 190.18 7.487
ISO3601 -170 196.53 7.737
ISO3601 -171 202.88 7.987
ISO3601 -172 209.23 1.27 8.237 0.050
ISO3601 -173 215.58 8.487
ISO3601 -174 221.93 8.737
ISO3601 -175 228.28 8.987
ISO3601 -176 234.63 1.4 9.237 0.055
ISO3601 -177 240.98 9.487
ISO3601 -178 247.33 9.737
ISO3601 -201 4.34 0.13 3.53 0.1 0.171 0.005 0.139 0.004
ISO3601 -202 5.94 0.234
ISO3601 -203 7.52 0.296
ISO3601 -204 9.12 0.359
ISO3601 -205 10.69 0.421
ISO3601 -206 12.29 0.484
ISO3601 -207 13.87 0.18 0.546 0.007
ISO3601 -208 15.47 0.23 0.609 0.009
ISO3601 -209 17.04 0.671
ISO3601 -210 18.64 0.25 0.734 0.010
ISO3601 -211 20.22 0.796
ISO3601 -212 21.82 0.859
ISO3601 -213 23.4 0.921
ISO3601 -214 25 0.984
ISO3601 -215 26.57 1.046
ISO3601 -216 28.17 0.3 1.109 0.012
ISO3601 -217 29.75 1.171
ISO3601 -218 31.34 1.234
ISO3601 -219 32.93 1.296
ISO3601 -220 34.52 1.359
ISO3601 -221 36.1 1.421
ISO3601 -222 37.7 0.38 1.484 0.015
ISO3601 -223 40.87 1.609
ISO3601 -224 44.05 1.734
ISO3601 -225 47.23 0.46 1.859 0.018
ISO3601 -227 53.57 2.109
ISO3601 -228 56.75 0.51 2.234 0.020
ISO3601 -229 59.92 2.359
ISO3601 -230 63.1 2.484
ISO3601 -231 66.27 2.609
ISO3601 -232 69.44 0.61 2.734 0.024
ISO3601 -233 72.62 2.859
ISO3601 -234 75.8 2.984
ISO3601 -235 78.97 3.109
ISO3601 -236 82.14 3.234
ISO3601 -237 85.32 3.359
ISO3601 -238 88.5 3.484
ISO3601 -239 91.67 0.71 3.609 0.028
ISO3601 -240 94.84 3.734
ISO3601 -241 98.02 3.859
ISO3601 -242 101.2 3.984
ISO3601 -243 104.37 4.109
ISO3601 -244 107.54 0.76 4.234 0.030
ISO3601 -245 110.72 4.359
ISO3601 -246 113.9 4.484
ISO3601 -247 117.07 4.609
ISO3601 -248 120.24 4.734
ISO3601 -249 123.42 0.89 4.859 0.035
ISO3601 -250 126.6 4.984
ISO3601 -251 129.77 5.109
ISO3601 -252 132.94 5.234
ISO3601 -253 136.12 5.359
ISO3601 -254 139.3 5.484
ISO3601 -255 142.47 5.609
ISO3601 -256 145.65 5.734
ISO3601 -257 148.82 5.859
ISO3601 -258 152 5.984
ISO3601 -259 158.35 1.02 6.234 0.040
ISO3601 -260 164.7 6.484
ISO3601 -261 171.05 6.734
ISO3601 -262 177.4 6.984
ISO3601 -263 183.75 1.14 7.234 0.045
ISO3601 -264 190.1 7.484
ISO3601 -265 196.45 7.734
ISO3601 -266 202.8 7.984
ISO3601 -267 209.15 1.27 8.234 0.050
ISO3601 -268 215.5 8.484
ISO3601 -269 221.85 8.734
ISO3601 -270 228.2 8.984
ISO3601 -271 234.55 1.4 9.234 0.055
ISO3601 -272 240.9 9.484
ISO3601 -273 247.25 9.734
ISO3601 -274 253.6 9.984
ISO3601 -275 266.3 10.484
ISO3601 -276 279 1.65 10.984 0.065
ISO3601 -277 291.7 11.484
ISO3601 -278 304.4 11.984
ISO3601 -279 329.8 12.984
ISO3601 -280 355.2 13.984
ISO3601 -281 380.6 14.984
ISO3601 -282 405.26 1.91 15.955 0.075
ISO3601 -283 430.66 2.03 16.955 0.080
ISO3601 -284 456.06 2.16 17.955 0.085
ISO3601 -309 10.46 0.13 5.33 0.13 0.412 0.005 0.210 0.005
ISO3601 -310 12.07 0.475
ISO3601 -311 13.64 0.18 0.537 0.007
ISO3601 -312 15.24 0.23 0.600 0.009
ISO3601 -313 16.81 0.662
ISO3601 -314 18.42 0.25 0.725 0.010
ISO3601 -315 19.99 0.787
ISO3601 -316 21.59 0.850
ISO3601 -317 23.16 0.912
ISO3601 -318 24.77 0.975
ISO3601 -319 26.34 1.037
ISO3601 -320 27.94 0.3 1.100 0.012
ISO3601 -321 29.51 1.162
ISO3601 -322 31.12 1.225
ISO3601 -323 32.69 1.287
ISO3601 -324 34.29 1.350
ISO3601 -325 37.47 0.38 1.475 0.015
ISO3601 -326 40.65 1.600
ISO3601 -327 43.82 1.725
ISO3601 -328 47 1.850
ISO3601 -329 50.16 0.46 1.975 0.018
ISO3601 -330 53.34 2.100
ISO3601 -331 56.52 2.225
ISO3601 -332 59.7 2.350
ISO3601 -333 62.87 0.51 2.475 0.020
ISO3601 -334 66.04 2.600
ISO3601 -335 69.22 2.725
ISO3601 -336 72.4 2.850
ISO3601 -337 75.57 0.61 2.975 0.024
ISO3601 -338 78.74 3.100
ISO3601 -339 81.92 3.225
ISO3601 -340 85.1 3.350
ISO3601 -341 88.27 3.475
ISO3601 -342 91.44 0.71 3.600 0.028
ISO3601 -343 94.62 3.725
ISO3601 -344 97.8 3.850
ISO3601 -345 100.97 3.975
ISO3601 -346 104.14 4.100
ISO3601 -347 107.32 0.76 4.225 0.030
ISO3601 -348 110.5 4.350
ISO3601 -349 113.67 4.475
ISO3601 -350 116.84 4.600
ISO3601 -351 120.02 4.725
ISO3601 -352 123.2 4.850
ISO3601 -353 126.37 0.94 4.975 0.037
ISO3601 -354 129.54 5.100
ISO3601 -355 132.72 5.225
ISO3601 -356 135.9 5.350
ISO3601 -357 139.07 5.475
ISO3601 -358 142.24 5.600
ISO3601 -359 145.42 5.725
ISO3601 -360 148.6 5.850
ISO3601 -361 151.77 5.975
ISO3601 -362 158.12 1.02 6.225 0.040
ISO3601 -363 164.47 6.475
ISO3601 -364 170.82 6.725
ISO3601 -365 177.17 6.975
ISO3601 -366 183.52 1.14 7.225 0.045
ISO3601 -367 189.87 7.475
ISO3601 -368 196.22 7.725
ISO3601 -369 202.57 7.975
ISO3601 -370 208.92 1.27 8.225 0.050
ISO3601 -371 215.27 8.475
ISO3601 -372 221.62 8.725
ISO3601 -373 227.97 8.975
ISO3601 -374 234.32 1.4 9.225 0.055
ISO3601 -375 240.67 9.475
ISO3601 -376 247.02 9.725
ISO3601 -377 253.37 9.975
ISO3601 -378 266.07 1.52 10.475 0.060
ISO3601 -379 278.77 10.975
ISO3601 -380 291.47 1.65 11.475 0.065
ISO3601 -381 304.17 11.975
ISO3601 -382 329.57 12.975
ISO3601 -383 354.97 1.78 13.975 0.070
ISO3601 -384 380.37 14.975
ISO3601 -385 405.26 1.91 15.955 0.075
ISO3601 -386 430.66 2.03 16.955 0.080
ISO3601 -387 456.06 2.16 17.955 0.085
ISO3601 -388 481.46 2.29 18.955 0.090
ISO3601 -389 506.86 2.41 19.955 0.095
ISO3601 -390 532.26 20.955
ISO3601 -391 557.66 2.54 21.955 0.100
ISO3601 -392 582.68 2.67 22.940 0.105
ISO3601 -393 608.08 2.79 23.940 0.110
ISO3601 -394 633.48 2.92 24.940 0.115
ISO3601 -395 658.88 3.05 25.940 0.120
ISO3601 -425 113.67 0.84 6.99 0.15 4.475 0.033 0.275 0.006
ISO3601 -426 116.84 4.600
ISO3601 -427 120.02 4.725
ISO3601 -428 123.2 4.850
ISO3601 -429 126.37 0.94 4.975 0.037
ISO3601 -430 129.54 5.100
ISO3601 -431 132.72 5.225
ISO3601 -432 135.9 5.350
ISO3601 -433 139.07 5.475
ISO3601 -434 142.24 5.600
ISO3601 -435 145.42 5.725
ISO3601 -436 148.6 5.850
ISO3601 -437 151.77 5.975
ISO3601 -438 158.12 1.02 6.225 0.040
ISO3601 -439 164.47 6.475
ISO3601 -440 170.82 6.725
ISO3601 -441 177.17 6.975
ISO3601 -442 183.52 1.14 7.225 0.045
ISO3601 -443 189.87 7.475
ISO3601 -444 196.22 7.725
ISO3601 -445 202.57 7.975
ISO3601 -446 215.27 1.4 8.475 0.055
ISO3601 -447 227.97 8.975
ISO3601 -448 240.67 9.475
ISO3601 -449 253.57 9.983
ISO3601 -450 266.07 1.52 10.475 0.060
ISO3601 -451 278.77 10.975
ISO3601 -452 291.47 11.475
ISO3601 -453 304.17 11.975
ISO3601 -454 316.87 12.475
ISO3601 -455 329.57 12.975
ISO3601 -456 342.27 1.78 13.475 0.070
ISO3601 -457 354.97 13.975
ISO3601 -458 367.67 14.475
ISO3601 -459 380.37 14.975
ISO3601 -460 393.07 15.475
ISO3601 -461 405.26 1.91 15.955 0.075
ISO3601 -462 417.96 16.455
ISO3601 -463 430.66 2.03 16.955 0.080
ISO3601 -464 443.36 2.16 17.455 0.085
ISO3601 -465 456.06 17.955
ISO3601 -466 468.76 18.455
ISO3601 -467 481.46 2.29 18.955 0.090
ISO3601 -468 494.16 19.455
ISO3601 -469 506.86 2.41 19.955 0.095
ISO3601 -470 532.26 20.955
ISO3601 -471 557.66 2.54 21.955 0.100
ISO3601 -472 582.68 2.67 22.940 0.105
ISO3601 -473 608.08 2.79 23.940 0.110
ISO3601 -474 633.48 2.92 24.940 0.115
ISO3601 -475 658.88 3.05 25.940 0.120