Product Description
Genuine Cummins
Cummins 3964817 — Piston Oil Squirter Banjo Bolt (Banjo Connector Screw)
MPN: 3964817 | Also Known As: banjo connector screw, piston cooling nozzle bolt | Mates With: oil squirter/nozzle 4937308 (sold separately)
Why This Part
- ✓ OE banjo bolt that secures each piston oil squirter/nozzle to the block.
- ✓ Direct-fit for 2003–2018 Ram 5.9L/6.7L ISB (verify by VIN/ESN).
- ✓ Restores factory oil cooling to the piston underside for longevity.
- ✓ Sold individually; 6 required per engine.
OE Fit Stock Replacement 6 Per Engine
Quick Specs
| Type | Piston oil squirter banjo bolt / banjo connector screw |
|---|---|
| OE Part # | 3964817 |
| Qty Required | 6 per engine (sold individually) |
| Pairs With | Oil squirter/nozzle 4937308 (sold separately) |
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 2003–2007 | Ram 5.9L ISB (24V Common-Rail) | Ram 2500/3500 |
| 2007.5–2018 | Ram 6.7L ISB (24V Common-Rail) | Ram 2500/3500 |
Industrial/Off-Highway: Also used across many ISB/QSB 5.9/6.7 applications—confirm by ESN.
Often Paired With
- Piston Oil Squirter / Nozzle: Cummins 4937308
- Sealing washers for banjo interfaces (sold separately; match by ESN)
- Engine oil & filter: refresh after contamination or bottom-end work
What’s In The Box
- (1) Genuine Cummins Piston Oil Squirter Banjo Bolt (3964817)
- Oil squirters and sealing washers sold separately.
Install Tips
- Use new sealing washers; clean threads and seating surfaces.
- Torque to factory spec; verify each squirter’s orientation.
- Prime oil system and check for leaks after startup.
FAQ
WILL THIS FIT MY 2003–2018 5.9L/6.7L CUMMINS RAM?Yes—this is the OE banjo bolt used with the piston oil squirters on 2003–2007 5.9L and 2007.5–2018 6.7L ISB (confirm by VIN/ESN).
HOW MANY OF THESE BOLTS DO I NEED?Six per engine—one for each piston oil squirter.
IS THIS THE CORRECT BOLT FOR NOZZLE 4937308?Yes—3964817 is the OE banjo bolt that secures oil squirter/nozzle 4937308 to the block.
DO I NEED NEW SEALING WASHERS?Recommended. Always replace sealing washers when servicing banjo fittings to ensure leak-free operation.
IS THIS A GENUINE CUMMINS PART?Yes—OE Cummins 3964817 for proper fit and durability.
