Baldwin B309 Oil Filter Cross Reference
Use this page to compare the Baldwin B309 with potentially compatible oil filters from other brands. Review thread size, gasket dimensions, overall height, and fitment notes before substituting. A cross reference is a research tool, not an automatic guarantee of fitment.
Before substituting: verify filter style, thread size or cartridge dimensions, gasket dimensions, height, clearance, bypass behavior, and application-specific requirements.
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Best equivalent matches
Select up to 4 filters, then click Compare to view their specs next to the searched filter.
5 compatible options
| Specification | Searched filter Baldwin B309 Reference filter | Baldwin BT238Best Match Score: 93 SAFE | Score: 93 SAFE | Score: 86 COMPATIBLE Large gasket OD variation · Large gasket ID variation | Score: 86 COMPATIBLE Large gasket OD variation · Large gasket ID variation |
|---|---|---|---|---|---|
| Thread size | 3/4-16 | 3/4-16 | 3/4-16 | 3/4-16 | 3/4-16 |
| Gasket OD | 71.4 mm | 71.4 mm | 71.4 mm | 71.98 mm | 71.98 mm |
| Gasket ID | 62.7 mm | 62.7 mm | 62.7 mm | 62.53 mm | 62.53 mm |
| Can OD | 108 mm | 108 mm | 108 mm | 108.6 mm | 108.8 mm |
| Height | 187.3 mm | 186.5 mm | 186.5 mm | 167.7 mm | 167.8 mm |
| Internal bypass valve | No | Yes | Yes | Yes | Yes |
| Bypass PSID | Unknown | 20 | 30 | 8 - 11 | 13 - 19 |
| Anti-drainback valve | No | Yes | Yes | Yes | Yes |
| ID top | Unknown | Unknown | Unknown | Unknown | Unknown |
| ID bottom | Unknown | Unknown | Unknown | Unknown | Unknown |
Other suitable matches
Related compatible filter pages
Frequently asked questions
What replaces Baldwin B309?
Several oil filter alternatives may be compatible with Baldwin B309, but you should always verify thread dimensions, gasket sealing dimensions, bypass behavior, anti-drainback valve requirements, and installation clearance before substituting.
How do I confirm a cross reference for Baldwin B309?
Compare thread size, thread pitch, gasket outside diameter, gasket inside diameter, can height, bypass pressure range, and anti-drainback valve requirements before using a substitute.
Can I use a different-size oil filter instead of Baldwin B309?
Sometimes, but only if thread compatibility, gasket seating, bypass behavior, and physical clearance are all acceptable for the application.