O-Ring Tables
O-Ring Table BS 4518
The BS 4518 standard series: all inner diameters and cord thicknesses with reference number. Use the search to quickly find your size.
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Size table
| BS 4518 no. | Inner diameter d₁ (mm) | Cord thickness d₂ (mm) |
|---|---|---|
| 0031-16 | 3.1 | 1.6 |
| 0041-16 | 4.1 | 1.6 |
| 0051-16 | 5.1 | 1.6 |
| 0061-16 | 6.1 | 1.6 |
| 0071-16 | 7.1 | 1.6 |
| 0081-16 | 8.1 | 1.6 |
| 0091-16 | 9.1 | 1.6 |
| 0101-16 | 10.1 | 1.6 |
| 0111-16 | 11.1 | 1.6 |
| 0121-16 | 12.1 | 1.6 |
| 0131-16 | 13.1 | 1.6 |
| 0141-16 | 14.1 | 1.6 |
| 0151-16 | 15.1 | 1.6 |
| 0161-16 | 16.1 | 1.6 |
| 0171-16 | 17.1 | 1.6 |
| 0181-16 | 18.1 | 1.6 |
| 0191-16 | 19.1 | 1.6 |
| 0201-16 | 20.1 | 1.6 |
| 0211-16 | 21.1 | 1.6 |
| 0221-16 | 22.1 | 1.6 |
| 0251-16 | 25.1 | 1.6 |
| 0271-16 | 27.1 | 1.6 |
| 0291-16 | 29.1 | 1.6 |
| 0321-16 | 32.1 | 1.6 |
| 0351-16 | 35.1 | 1.6 |
| 0371-16 | 37.1 | 1.6 |
| 0036-24 | 3.6 | 2.4 |
| 0046-24 | 4.6 | 2.4 |
| 0056-24 | 5.6 | 2.4 |
| 0066-24 | 6.6 | 2.4 |
| 0076-24 | 7.6 | 2.4 |
| 0086-24 | 8.6 | 2.4 |
| 0096-24 | 9.6 | 2.4 |
| 0106-24 | 10.6 | 2.4 |
| 0116-24 | 11.6 | 2.4 |
| 0126-24 | 12.6 | 2.4 |
| 0136-24 | 13.6 | 2.4 |
| 0146-24 | 14.6 | 2.4 |
| 0156-24 | 15.6 | 2.4 |
| 0166-24 | 16.6 | 2.4 |
| 0176-24 | 17.6 | 2.4 |
| 0186-24 | 18.6 | 2.4 |
| 0196-24 | 19.6 | 2.4 |
| 0206-24 | 20.6 | 2.4 |
| 0216-24 | 21.6 | 2.4 |
| 0246-24 | 24.6 | 2.4 |
| 0276-24 | 27.6 | 2.4 |
| 0296-24 | 29.6 | 2.4 |
| 0316-24 | 31.6 | 2.4 |
| 0346-24 | 34.6 | 2.4 |
| 0356-24 | 35.6 | 2.4 |
| 0376-24 | 37.6 | 2.4 |
| 0396-24 | 39.6 | 2.4 |
| 0416-24 | 41.6 | 2.4 |
| 0446-24 | 44.6 | 2.4 |
| 0456-24 | 45.6 | 2.4 |
| 0476-24 | 47.6 | 2.4 |
| 0496-24 | 49.6 | 2.4 |
| 0516-24 | 51.6 | 2.4 |
| 0546-24 | 54.6 | 2.4 |
| 0556-24 | 55.6 | 2.4 |
| 0576-24 | 57.6 | 2.4 |
| 0586-24 | 58.6 | 2.4 |
| 0596-24 | 59.6 | 2.4 |
| 0616-24 | 61.6 | 2.4 |
| 0626-24 | 62.6 | 2.4 |
| 0646-24 | 64.6 | 2.4 |
| 0676-24 | 67.6 | 2.4 |
| 0696-24 | 69.6 | 2.4 |
| 0195-30 | 19.5 | 3 |
| 0215-30 | 21.5 | 3 |
| 0225-30 | 22.5 | 3 |
| 0245-30 | 24.5 | 3 |
| 0255-30 | 25.5 | 3 |
| 0265-30 | 26.5 | 3 |
| 0275-30 | 27.5 | 3 |
| 0295-30 | 29.5 | 3 |
| 0315-30 | 31.5 | 3 |
| 0325-30 | 32.5 | 3 |
| 0345-30 | 34.5 | 3 |
| 0355-30 | 35.5 | 3 |
| 0365-30 | 36.5 | 3 |
| 0375-30 | 37.5 | 3 |
| 0395-30 | 39.5 | 3 |
| 0415-30 | 41.5 | 3 |
| 0425-30 | 42.5 | 3 |
| 0445-30 | 44.5 | 3 |
| 0495-30 | 49.5 | 3 |
| 0545-30 | 54.5 | 3 |
| 0555-30 | 55.5 | 3 |
| 0575-30 | 57.5 | 3 |
| 0595-30 | 59.5 | 3 |
| 0625-30 | 62.5 | 3 |
| 0645-30 | 64.5 | 3 |
| 0695-30 | 69.5 | 3 |
| 0745-30 | 74.5 | 3 |
| 0795-30 | 79.5 | 3 |
| 0845-30 | 84.5 | 3 |
| 0895-30 | 89.5 | 3 |
| 0945-30 | 94.5 | 3 |
| 0995-30 | 99.5 | 3 |
| 1045-30 | 104.5 | 3 |
| 1095-30 | 109.5 | 3 |
| 1145-30 | 114.5 | 3 |
| 1195-30 | 119.5 | 3 |
| 1245-30 | 124.5 | 3 |
| 1295-30 | 129.5 | 3 |
| 1345-30 | 134.5 | 3 |
| 1395-30 | 139.5 | 3 |
| 1445-30 | 144.5 | 3 |
| 1495-30 | 149.5 | 3 |
| 1545-30 | 154.5 | 3 |
| 1595-30 | 159.5 | 3 |
| 1645-30 | 164.5 | 3 |
| 1695-30 | 169.5 | 3 |
| 1745-30 | 174.5 | 3 |
| 1795-30 | 179.5 | 3 |
| 1845-30 | 184.5 | 3 |
| 1895-30 | 189.5 | 3 |
| 1945-30 | 194.5 | 3 |
| 1995-30 | 199.5 | 3 |
| 2095-30 | 209.5 | 3 |
| 2195-30 | 219.5 | 3 |
| 2295-30 | 229.5 | 3 |
| 2395-30 | 239.5 | 3 |
| 2445-30 | 244.5 | 3 |
| 2495-30 | 249.5 | 3 |
| 0443-57 | 44.3 | 5.7 |
| 0453-57 | 45.3 | 5.7 |
| 0493-57 | 49.3 | 5.7 |
| 0523-57 | 52.3 | 5.7 |
| 0543-57 | 54.3 | 5.7 |
| 0553-57 | 55.3 | 5.7 |
| 0593-57 | 59.3 | 5.7 |
| 0623-57 | 62.3 | 5.7 |
| 0643-57 | 64.3 | 5.7 |
| 0693-57 | 69.3 | 5.7 |
| 0743-57 | 74.3 | 5.7 |
| 0793-57 | 79.3 | 5.7 |
| 0843-57 | 84.3 | 5.7 |
| 0893-57 | 89.3 | 5.7 |
| 0943-57 | 94.3 | 5.7 |
| 0993-57 | 99.3 | 5.7 |
| 1043-57 | 104.3 | 5.7 |
| 1093-57 | 109.3 | 5.7 |
| 1143-57 | 114.3 | 5.7 |
| 1193-57 | 119.3 | 5.7 |
| 1243-57 | 124.3 | 5.7 |
| 1293-57 | 129.3 | 5.7 |
| 1343-57 | 134.3 | 5.7 |
| 1393-57 | 139.3 | 5.7 |
| 1443-57 | 144.3 | 5.7 |
| 1493-57 | 149.3 | 5.7 |
| 1543-57 | 154.3 | 5.7 |
| 1593-57 | 159.3 | 5.7 |
| 1643-57 | 164.3 | 5.7 |
| 1693-57 | 169.3 | 5.7 |
| 1743-57 | 174.3 | 5.7 |
| 1793-57 | 179.3 | 5.7 |
| 1843-57 | 184.3 | 5.7 |
| 1893-57 | 189.3 | 5.7 |
| 1943-57 | 194.3 | 5.7 |
| 1993-57 | 199.3 | 5.7 |
| 2093-57 | 209.3 | 5.7 |
| 2193-57 | 219.3 | 5.7 |
| 2293-57 | 229.3 | 5.7 |
| 2393-57 | 239.3 | 5.7 |
| 2493-57 | 249.3 | 5.7 |
| 2593-57 | 259.3 | 5.7 |
| 2693-57 | 269.3 | 5.7 |
| 2793-57 | 279.3 | 5.7 |
| 2893-57 | 289.3 | 5.7 |
| 2993-57 | 299.3 | 5.7 |
| 3093-57 | 309.3 | 5.7 |
| 3193-57 | 319.3 | 5.7 |
| 3393-57 | 339.3 | 5.7 |
| 3593-57 | 359.3 | 5.7 |
| 3793-57 | 379.3 | 5.7 |
| 3893-57 | 389.3 | 5.7 |
| 3993-57 | 399.3 | 5.7 |
| 4193-57 | 419.3 | 5.7 |
| 4393-57 | 439.3 | 5.7 |
| 4593-57 | 459.3 | 5.7 |
| 4793-57 | 479.3 | 5.7 |
| 4893-57 | 489.3 | 5.7 |
| 4993-57 | 499.3 | 5.7 |
| 1441-84 | 144.1 | 8.4 |
| 1491-84 | 149.1 | 8.4 |
| 1541-84 | 154.1 | 8.4 |
| 1591-84 | 159.1 | 8.4 |
| 1641-84 | 164.1 | 8.4 |
| 1691-84 | 169.1 | 8.4 |
| 1741-84 | 174.1 | 8.4 |
| 1791-84 | 179.1 | 8.4 |
| 1841-84 | 184.1 | 8.4 |
| 1891-84 | 189.1 | 8.4 |
| 1941-84 | 194.1 | 8.4 |
| 1991-84 | 199.1 | 8.4 |
| 2041-84 | 204.1 | 8.4 |
| 2091-84 | 209.1 | 8.4 |
| 2191-84 | 219.1 | 8.4 |
| 2291-84 | 229.1 | 8.4 |
| 2341-84 | 234.1 | 8.4 |
| 2391-84 | 239.1 | 8.4 |
| 2491-84 | 249.1 | 8.4 |
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O-ring groove dimensions at a glance
Groove width and depth per cord thickness for flange, piston and rod seals, static and dynamic.
To the O-ring groove dimension table →