FRAM PH3403 vs Fleetguard LF3861: Oil Filter Compatibility
Compare FRAM PH3403 and Fleetguard LF3861 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 1-12 thread.
Quick verdict
Bypass presence unknown on one or both filters · ADBV unknown on one or both filters
- 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.
FRAM PH3403 and Fleetguard LF3861 specifications
How matching is scored| Specification | FRAM PH3403 | Fleetguard LF3861 |
|---|---|---|
| Thread size | 1"-12UNF | 1-12 UNF-2B |
| Gasket OD | 71 mm | 71.98 mm |
| Gasket ID | 61 mm | 62.53 mm |
| Can OD | 96.77 mm | 94 mm |
| Height | 175.51 mm | 175 mm |
| Internal bypass valve | Yes | Unknown |
| Bypass PSID | 12 | 20.16 |
| Anti-drainback valve | Yes | Unknown |
What matters in this specific comparison
Thread size matches: both are 1-12.
Gasket OD differs by 1 mm (FRAM PH3403: 71 mm, Fleetguard LF3861: 71.98 mm).
Gasket ID differs by 1.5 mm (FRAM PH3403: 61 mm, Fleetguard LF3861: 62.53 mm).
FRAM PH3403 is 0.5 mm taller (FRAM PH3403: 175.51 mm, Fleetguard LF3861: 175 mm) -- check clearance before substituting.
Can OD differs by 2.8 mm (FRAM PH3403: 96.77 mm, Fleetguard LF3861: 94 mm).
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.