Baldwin BT217 vs Baldwin B481: Oil Filter Compatibility
Compare Baldwin BT217 and Baldwin B481 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
Large bypass PSI mismatch: 42 psi · 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.
Baldwin BT217 and Baldwin B481 specifications
How matching is scored| Specification | Baldwin BT217 | Baldwin B481 |
|---|---|---|
| Thread size | 3/4-16 | 3/4-16 |
| Gasket OD | 71.4 mm | 71.4 mm |
| Gasket ID | 62.7 mm | 62.7 mm |
| Can OD | 93.7 mm | 93.7 mm |
| Height | 181 mm | 168.3 mm |
| Internal bypass valve | Yes | Yes |
| Bypass PSID | 8 | 50 |
| Anti-drainback valve | Yes | No |
What matters in this specific comparison
Thread size matches: both are 3/4-16.
Gasket OD is identical at 71.4 mm.
Gasket ID is identical at 62.7 mm.
Baldwin BT217 is 12.7 mm taller (Baldwin BT217: 181 mm, Baldwin B481: 168.3 mm) -- check clearance before substituting.
Can OD is identical at 93.7 mm.
Both open their bypass valve in a comparable range: Baldwin BT217 at 8-8 psi, Baldwin B481 at 50-50 psi -- these ranges do not overlap.
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.