Product Description
Cummins 5264181 — Injector Fuel Supply Connector Retainer / Connector Tube Nut
MPN: 5264181 | Also Known As: injector connector tube nut, crossover tube nut, fuel supply connector retainer | Sold: Individually (6 required per engine)
Why This Part
- ✓ OE tube nut that secures the injector connector tube to the injector for a leak-free seal.
- ✓ Direct-fit for 2003–2007 Ram 5.9L ISB common-rail (verify by VIN/ESN).
- ✓ Prevents fuel seep and hard-start issues from damaged or mangled nuts.
- ✓ Built to Cummins metallurgy/tolerance for repeatable clamp load.
Quick Specs
| Type | Injector fuel supply connector retainer (connector tube nut) |
|---|---|
| OE Part # | 5264181 |
| Cross-Refs (ID only) | 3946625, 4893739, 5259180, 4935686 |
| Qty Required | 6 per engine (sold individually) |
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 2003–2007 | Ram 5.9L ISB (24V Common-Rail) | Ram 2500/3500 |
Industrial/Off-Highway: Seen on various ISB/QSB 6.7 (EPA13+) applications—verify by ESN before ordering.
Often Paired With
- Injector Connector Tube: Cummins 2872288 (’03–’24 5.9L/6.7L)
- New injectors or sealing service
What’s In The Box
- (1) Genuine Cummins Injector Connector Tube Nut / Retainer (5264181)
- Connector tube and injector(s) sold separately (see “Often Paired With”).
Install Tips
- Inspect connector tube cone and injector inlet for damage; replace as needed.
- Follow Cummins torque/cleanliness procedures; do not reuse deformed/damaged nuts.
- Bleed/prime fuel system after service and check for leaks on warm-up.
FAQ
WILL THIS FIT MY 2003–2007 5.9L CUMMINS RAM?Yes—this is the OE tube nut/retainer used on 2003–2007 5.9L ISB common-rail Ram 2500/3500 (verify by VIN/ESN).
HOW MANY DO I NEED?Six per engine (one per injector). This listing is sold individually so you can order exactly what you need.
WHAT’S THE MATCHING CONNECTOR TUBE?Cummins 2872288 is the OE injector connector tube commonly paired with this nut/retainer.
IS THIS A GENUINE CUMMINS PART?Yes—OE Cummins 5264181 for proper fit, sealing, and durability.
DOES THIS ALSO FIT 6.7L APPLICATIONS?Some industrial ISB/QSB 6.7 engines use this retainer. Automotive 6.7L Rams may differ—always verify by ESN before ordering.
