Donaldson P550335 vs Baldwin B1406: Oil Filter Compatibility
Compare Donaldson P550335 and Baldwin B1406 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 3/4-16 thread.
Quick verdict
Candidate adds ADBV
- 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.
Donaldson P550335 and Baldwin B1406 specifications
How matching is scored| Specification | Donaldson P550335 | Baldwin B1406 |
|---|---|---|
| Thread size | 3/4-16 | 3/4-16 |
| Gasket OD | 70 mm | 71.4 mm |
| Gasket ID | 60 mm | 62.7 mm |
| Can OD | 76 mm | 68.3 mm |
| Height | 86 mm | 88.9 mm |
| Internal bypass valve | No | No |
| Bypass PSID | Not applicable | Not applicable |
| Anti-drainback valve | No | Yes |
What matters in this specific comparison
Thread size matches: both are 3/4-16.
Gasket OD differs by 1.4 mm (Donaldson P550335: 70 mm, Baldwin B1406: 71.4 mm).
Gasket ID differs by 2.7 mm (Donaldson P550335: 60 mm, Baldwin B1406: 62.7 mm).
Baldwin B1406 is 2.9 mm taller (Donaldson P550335: 86 mm, Baldwin B1406: 88.9 mm) -- check clearance before substituting.
Can OD differs by 7.7 mm (Donaldson P550335: 76 mm, Baldwin B1406: 68.3 mm).
Anti-drainback valve differs: Baldwin B1406 has one, Donaldson P550335 does not.
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.