BS 4518 O-Ring Sizes

BS4518 SizeInternal Dia' (mm)Internal Dia' Tol' (+/-mm)Cross Section (mm)Cross Section Tol' (mm)Internal Dia' (inches)Internal Dia' Tol' (+/- inches)Cross Section (inches)Cross Section Tol' (inches)
BS4518 -0031-16 3.1 0.15 1.6 0.08 0.122 0.006 0.063 0.003
BS4518 -0041-16 4.1 0.161
BS4518 -0051-16 5.1 0.201
BS4518 -0061-16 6.1 0.240
BS4518 -0071-16 7.1 0.280
BS4518 -0081-16 8.1 0.319
BS4518 -0091-16 9.1 0.358
BS4518 -0101-16 10.1 0.2 0.398 0.008
BS4518 -0111-16 11.1 0.437
BS4518 -0121-16 12.1 0.476
BS4518 -0131-16 13.1 0.516
BS4518 -0141-16 14.1 0.555
BS4518 -0151-16 15.1 0.594
BS4518 -0161-16 16.1 0.634
BS4518 -0171-16 17.1 0.673
BS4518 -0181-16 18.1 0.25 0.713 0.010
BS4518 -0191-16 19.1 0.752
BS4518 -0221-16 22.1 0.870
BS4518 -0251-16 25.1 0.988
BS4518 -0271-16 27.1 1.067
BS4518 -0291-16 29.1 1.146
BS4518 -0321-16 32.1 0.3 1.264 0.012
BS4518 -0351-16 35.1 1.382
BS4518 -0371-16 37.1 1.461
BS4518 -0036-24 3.6 0.15 2.4 0.142 0.006 0.094
BS4518 -0046-24 4.6 0.181
BS4518 -0056-24 5.6 0.220
BS4518 -0066-24 6.6 0.260
BS4518 -0076-24 7.6 0.299
BS4518 -0086-24 8.6 0.339
BS4518 -0096-24 9.6 0.378
BS4518 -0106-24 10.6 0.2 0.417 0.008
BS4518 -0116-24 11.6 0.457
BS4518 -0126-24 12.6 0.496
BS4518 -0136-24 13.6 0.535
BS4518 -0146-24 14.6 0.575
BS4518 -0156-24 15.6 0.614
BS4518 -0166-24 16.6 0.654
BS4518 -0176-24 17.6 0.693
BS4518 -0186-24 18.6 0.25 0.732 0.010
BS4518 -0196-24 19.6 0.772
BS4518 -0206-24 20.6 0.811
BS4518 -0216-24 21.6 0.850
BS4518 -0246-24 24.6 0.969
BS4518 -0276-24 27.6 1.087
BS4518 -0296-24 29.6 1.165
BS4518 -0316-24 31.6 0.3 1.244 0.012
BS4518 -0346-24 34.6 1.362
BS4518 -0356-24 35.6 1.402
BS4518 -0376-24 37.6 1.480
BS4518 -0396-24 39.6 1.559
BS4518 -0416-24 41.6 1.638
BS4518 -0446-24 44.6 1.756
BS4518 -0456-24 45.6 1.795
BS4518 -0476-24 47.6 1.874
BS4518 -0496-24 49.6 1.953
BS4518 -0516-24 51.6 0.4 2.031 0.016
BS4518 -0546-24 54.6 2.150
BS4518 -0556-24 55.6 2.189
BS4518 -0576-24 57.6 2.268
BS4518 -0586-24 58.6 2.307
BS4518 -0596-24 59.6 2.346
BS4518 -0616-24 61.6 2.425
BS4518 -0626-24 62.6 2.465
BS4518 -0646-24 64.6 2.543
BS4518 -0676-24 67.6 2.661
BS4518 -0696-24 69.6 2.740
BS4518 -0195-30 19.5 0.25 3 0.1 0.768 0.010 0.118 0.004
BS4518 -0215-30 21.5 0.846
BS4518 -0225-30 22.5 0.886
BS4518 -0245-30 24.5 0.965
BS4518 -0255-30 25.5 1.004
BS4518 -0265-30 26.5 1.043
BS4518 -0275-30 27.5 1.083
BS4518 -0295-30 29.5 1.161
BS4518 -0315-30 31.5 0.3 1.240 0.012
BS4518 -0325-30 32.5 1.280
BS4518 -0345-30 34.5 1.358
BS4518 -0355-30 35.5 1.398
BS4518 -0365-30 36.5 1.437
BS4518 -0375-30 37.5 1.476
BS4518 -0395-30 39.5 1.555
BS4518 -0415-30 41.5 1.634
BS4518 -0425-30 42.5 1.673
BS4518 -0445-30 44.5 1.752
BS4518 -0495-30 49.5 1.949
BS4518 -0545-30 54.5 0.4 2.146 0.016
BS4518 -0555-30 55.5 2.185
BS4518 -0575-30 57.5 2.264
BS4518 -0595-30 59.5 2.343
BS4518 -0625-30 62.5 2.461
BS4518 -0645-30 64.5 2.539
BS4518 -0695-30 69.5 2.736
BS4518 -0745-30 74.5 2.933
BS4518 -0795-30 79.5 3.130
BS4518 -0845-30 84.5 0.5 3.327 0.020
BS4518 -0895-30 89.5 3.524
BS4518 -0945-30 94.5 3.720
BS4518 -0995-30 99.5 3.917
BS4518 -1045-30 104.5 4.114
BS4518 -1095-30 109.5 4.311
BS4518 -1145-30 114.5 4.508
BS4518 -1195-30 119.5 4.705
BS4518 -1245-30 124.5 0.6 4.902 0.024
BS4518 -1295-30 129.5 5.098
BS4518 -1345-30 134.5 5.295
BS4518 -1395-30 139.5 5.492
BS4518 -1445-30 144.5 5.689
BS4518 -1495-30 149.5 5.886
BS4518 -1545-30 154.5 6.083
BS4518 -1595-30 159.5 6.280
BS4518 -1645-30 164.5 6.476
BS4518 -1695-30 169.5 6.673
BS4518 -1745-30 174.5 6.870
BS4518 -1795-30 179.5 7.067
BS4518 -1845-30 184.5 0.8 7.264 0.031
BS4518 -1895-30 189.5 7.461
BS4518 -1945-30 194.5 7.657
BS4518 -1995-30 199.5 7.854
BS4518 -2095-30 209.5 8.248
BS4518 -2195-30 219.5 8.642
BS4518 -2295-30 229.5 9.035
BS4518 -2395-30 239.5 9.429
BS4518 -2445-30 244.5 9.626
BS4518 -2495-30 249.5 9.823
BS4518 -0443-57 44.3 0.3 5.7 0.12 1.744 0.012 0.224 0.005
BS4518 -0453-57 45.3 1.783
BS4518 -0493-57 49.3 1.941
BS4518 -0523-57 52.3 0.4 2.059 0.016
BS4518 -0543-57 54.3 2.138
BS4518 -0553-57 55.3 2.177
BS4518 -0593-57 59.3 2.335
BS4518 -0623-57 62.3 2.453
BS4518 -0643-57 64.3 2.531
BS4518 -0693-57 69.3 2.728
BS4518 -0743-57 74.3 2.925
BS4518 -0793-57 79.3 3.122
BS4518 -0843-57 84.3 0.5 3.319 0.020
BS4518 -0893-57 89.3 3.516
BS4518 -0943-57 94.3 3.713
BS4518 -0993-57 99.3 3.909
BS4518 -1043-57 104.3 4.106
BS4518 -1093-57 109.3 4.303
BS4518 -1143-57 114.3 4.500
BS4518 -1193-57 119.3 4.697
BS4518 -1243-57 124.3 0.6 4.894 0.024
BS4518 -1293-57 129.3 5.091
BS4518 -1343-57 134.3 5.287
BS4518 -1393-57 139.3 5.484
BS4518 -1443-57 144.3 5.681
BS4518 -1493-57 149.3 5.878
BS4518 -1543-57 154.3 6.075
BS4518 -1593-57 159.3 6.272
BS4518 -1643-57 164.3 6.469
BS4518 -1693-57 169.3 6.665
BS4518 -1743-57 174.3 6.862
BS4518 -1793-57 179.3 7.059
BS4518 -1843-57 184.3 0.8 7.256 0.031
BS4518 -1893-57 189.3 7.453
BS4518 -1943-57 194.3 7.650
BS4518 -1993-57 199.3 7.846
BS4518 -2093-57 209.3 8.240
BS4518 -2193-57 219.3 8.634
BS4518 -2293-57 229.3 9.028
BS4518 -2393-57 239.3 9.421
BS4518 -2493-57 249.3 9.815
BS4518 -2593-57 259.3 1 10.209 0.039
BS4518 -2693-57 269.3 10.602
BS4518 -2793-57 279.3 10.996
BS4518 -2893-57 289.3 11.390
BS4518 -2993-57 299.3 11.783
BS4518 -3093-57 309.3 1.5 12.177 0.059
BS4518 -3193-57 319.3 12.571
BS4518 -3393-57 339.3 13.358
BS4518 -3593-57 359.3 14.146
BS4518 -3793-57 379.3 14.933
BS4518 -3893-57 389.3 15.327
BS4518 -3993-57 399.3 15.720
BS4518 -4193-57 419.3 2 16.508 0.079
BS4518 -4393-57 439.3 17.295
BS4518 -4593-57 459.3 18.083
BS4518 -4793-57 479.3 18.870
BS4518 -4893-57 489.3 19.264
BS4518 -4993-57 499.3 19.657
BS4518 -1441-84 144.1 0.6 8.4 0.15 5.673 0.024 0.331 0.006
BS4518 -1491-84 149.1 5.870
BS4518 -1541-84 154.1 6.067
BS4518 -1591-84 159.1 6.264
BS4518 -1641-84 164.1 6.461
BS4518 -1691-84 169.1 6.657
BS4518 -1741-84 174.1 6.854
BS4518 -1791-84 179.1 7.051
BS4518 -1841-84 184.1 0.8 7.248 0.031
BS4518 -1891-84 189.1 7.445
BS4518 -1941-84 194.1 7.642
BS4518 -1991-84 199.1 7.839
BS4518 -2041-84 204.1 8.035
BS4518 -2091-84 209.1 8.232
BS4518 -2191-84 219.1 8.626
BS4518 -2291-84 229.1 9.020
BS4518 -2341-84 234.1 9.217
BS4518 -2391-84 239.1 9.413
BS4518 -2491-84 249.1 9.807