National 6186 Oil Seal — SKF/CR Equivalent
| SKF / CR Part No. | Catalog Source |
|---|---|
| 21820 | Verified in both SKF 457012 & National 430i catalogs |
| Dimension | Metric (mm) | Inch |
|---|---|---|
| Shaft diameter | 55.55 | 2.187 |
| Housing bore | 81 | 3.189 |
| Seal O.D. | 81.13 | 3.194 |
| Width | 18.24 | 0.718 |
Size 55.55 × 81 × 18.24 mm (2.187 × 3.189 × 0.718 in), lip material code L — from the National 430i catalog. Always confirm shaft diameter, bore diameter and width against your application before ordering.
Verify dimensions before ordering. Interchange numbers mean the same shaft/bore application, but lip material, spring design or width can differ between brands. Metric sizes can be checked on our oil seal size chart.
Need this seal? Email sales@sealstocks.com with part number National 6186 for stock & pricing. Factory direct, global shipping.