Bosch 3400 vs Baldwin B1406: Oil Filter Compatibility
Compare Bosch 3400 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
Closest known dimensional difference: height -13.2 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.
Bosch 3400 and Baldwin B1406 specifications
How matching is scored| Specification | Bosch 3400 | Baldwin B1406 |
|---|---|---|
| Thread size | 3/4-16 | 3/4-16 |
| Gasket OD | 71 mm | 71.4 mm |
| Gasket ID | 62 mm | 62.7 mm |
| Can OD | 76 mm | 68.3 mm |
| Height | 102.11 mm | 88.9 mm |
| Internal bypass valve | No | No |
| Bypass PSID | Not applicable | Not applicable |
| Anti-drainback valve | Yes | Yes |
What matters in this specific comparison
Thread size matches: both are 3/4-16.
Gasket OD differs by 0.4 mm (Bosch 3400: 71 mm, Baldwin B1406: 71.4 mm).
Gasket ID differs by 0.7 mm (Bosch 3400: 62 mm, Baldwin B1406: 62.7 mm).
Bosch 3400 is 13.2 mm taller (Bosch 3400: 102.11 mm, Baldwin B1406: 88.9 mm) -- check clearance before substituting.
Can OD differs by 7.7 mm (Bosch 3400: 76 mm, Baldwin B1406: 68.3 mm).
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.