Baldwin BT334 vs Donaldson P559128: Oil Filter Compatibility
Compare Baldwin BT334 and Donaldson P559128 oil filters by compatibility, dimensions, thread size, gasket fit, bypass valve, anti-drainback valve status, and match confidence. Use this comparison as a fitment review, not as an automatic substitution guarantee. Both use a 11/8-16 thread.
Quick verdict
Closest known dimensional difference: height +10.5 mm. Verify application-specific requirements before substituting.
- Thread size is the first hard-fit check for any comparison of spin-on filters.
- Gasket OD and gasket ID are the most important seal-related dimensions.
- Height differences can matter for clearance even when thread and gasket fit appear close.
- Bypass and anti-drainback differences may be important, depending on the application.
Baldwin BT334 and Donaldson P559128 specifications
How matching is scored| Specification | Baldwin BT334 | Donaldson P559128 |
|---|---|---|
| Thread size | 11/8-16 | 11/8-16 |
| Gasket OD | 71.4 mm | 72 mm |
| Gasket ID | 62.7 mm | 62 mm |
| Can OD | 93.7 mm | 107 mm |
| Height | 136.5 mm | 147 mm |
| Internal bypass valve | No | No |
| Bypass PSID | Not applicable | Not applicable |
| Anti-drainback valve | No | No |
What matters in this specific comparison
Thread size matches: both are 11/8-16.
Gasket OD differs by 0.6 mm (Baldwin BT334: 71.4 mm, Donaldson P559128: 72 mm).
Gasket ID differs by 0.7 mm (Baldwin BT334: 62.7 mm, Donaldson P559128: 62 mm).
Donaldson P559128 is 10.5 mm taller (Baldwin BT334: 136.5 mm, Donaldson P559128: 147 mm) -- check clearance before substituting.
Can OD differs by 13.3 mm (Baldwin BT334: 93.7 mm, Donaldson P559128: 107 mm).
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.