National 8139 Oil Seal — SKF/CR Equivalent
| SKF / CR Part No. | Catalog Source |
|---|---|
| 20118 | Verified in both SKF 457012 & National 430i catalogs |
| Dimension | Metric (mm) | Inch |
|---|---|---|
| Shaft diameter | 50.8 | 2 |
| Housing bore | 75.21 | 2.961 |
| Seal O.D. | 75.46 | 2.971 |
| Width | 6.35 | 0.25 |
Size 50.8 × 75.21 × 6.35 mm (2 × 2.961 × 0.25 in), lip material code F — 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 8139 for stock & pricing. Factory direct, global shipping.