Description
PAI 050588 is the oil pan drain plug kit for PAI Oil Pan 141283 on Cummins ISX engines. The kit packages the four M27 x 2 main drain plugs (PAI 050580, crossing Cummins 3678611 and 4926565) plus the M14 x 1.5 SAE straight-thread O-ring boss plug (PAI 050572, crossing Cummins 3680420, 3678921, 3977853). All five plugs ship with their matching O-rings so the pan can be sealed up in one shot.
Specifications
| Manufacturer | PAI Industries |
|---|---|
| Part Number | 050588 |
| Part Type | Oil Pan Drain Plug Kit |
| Engine Compatibility | Cummins ISX (with PAI Oil Pan 141283) |
Kit Includes
- Drain Plug — PAI 050580 — M27 x 2, 32 mm OD x 23.5 mm, with O-ring (PAI 121366) (qty 4) — crosses Cummins 3678611, 4926565
- SAE-ORB Plug — PAI 050572 — M14 x 1.5, 19 mm OD x 16 mm, with O-ring (PAI 121210) (qty 1) — crosses Cummins 3680420, 3678921, 3977853
Cross References
The kit components replace or are equivalent to the following Cummins part numbers:
- Cummins (050580): 3678611, 4926565
- Cummins (050572): 3680420, 3678921, 3977853
Applications
This drain plug kit fits the following engines:
- Cummins ISX / ISX15 / X15 (with PAI Oil Pan 141283)
- Cummins ISX12 (where PAI 141283 oil pan is used)
Representative vehicles using these engines:
- Freightliner Cascadia, Columbia, Coronado
- Kenworth T660, T680, T800, T880, W900 (Cummins-spec)
- Peterbilt 386, 389, 567, 579 (Cummins-spec)
- International ProStar, LoneStar (Cummins-spec)
- Western Star 4900, 5700 (Cummins-spec)
Verify your existing oil pan part number and drain plug configuration before ordering. Some Cummins ISX oil pans use a different plug pattern.









