Product Description
CUMMINS 3900625 OEM HEX FLANGE HEAD CAP SCREW – INTAKE AIR HEATER HARNESS BOLT – RAM 5.9L/6.7L (2003–2013)
The CUMMINS 3900625 OEM Hex Flange Head Cap Screw is the factory-correct hardware used on a wide range of intake air heater / grid heater harness assemblies found on 2003–2013 Ram trucks equipped with the 5.9L and 6.7L Cummins engines. This bolt ensures proper clamp load, secure electrical connection, and reliable long-term operation of the grid heater system—an essential component for cold-weather starting.
Cheap aftermarket hardware often strips, loosens, or corrodes prematurely. With genuine Cummins 3900625 hardware installed, you get the exact fitment, hardness rating, and flange-seat design engineered by Cummins for critical intake heater electrical connections.
Whether you are repairing melted grid heater wiring, replacing a faulty relay, installing a new OEM heater element, or refreshing the intake assembly, this bolt restores factory reliability and prevents future connection failures.
Fitment Details
- Engine: 5.9L Cummins (2003–2007), 6.7L Cummins (2007.5–2013)
- Vehicle: Ram 2500 / 3500 (2003–2013), Ram 3500/4500/5500 chassis variants where equipped
- Application: Intake Air Heater / Grid Heater Harness Bolt (M6x1x10)
Note: Always verify by VIN/ESN to confirm hardware usage for your specific Cummins platform.
Cross-Reference & Companion Cummins Parts
These genuine Cummins components commonly pair with the 3900625 OEM bolt during intake air heater service:
No aftermarket substitutions are recommended for this critical fastener.
Installation Notes
- Clean mating surfaces and electrical eyelets before installation.
- Torque to Cummins specification—do not overtighten.
- Inspect nearby wiring for overheating or corrosion.
- Replace in pairs when servicing heater harnesses for even clamp load.
Specifications for cummins 3900625
| Attribute | Value |
|---|---|
| Brand | Cummins (Genuine OEM) |
| Cummins Part Number | 3900625 |
| Hardware Type | Hex Flange Head Cap Screw (M6 x 1.0 x 10mm) |
| Function | Secures intake air heater/grid heater electrical harness connections |
| Engine Compatibility | 5.9L Cummins (2003–2007), 6.7L Cummins (2007.5–2013) |
| Vehicle Fitment | 2003–2013 Ram 2500/3500/4500/5500 Cummins-equipped trucks |
| UPC | N/A |
| GTIN | N/A |
| Shipping Weight | Approx. 0.02 lb |
| Shipping Method | Standard ground shipping |
| Cross Reference | Used in multiple Cummins heater grid assemblies; verify by ESN |
| E-Codes | Not emissions-sensitive; hardware item |
| Prop 65 Warning | WARNING: May expose you to chemicals including metal and combustion residues. See www.P65Warnings.ca.gov. |
| Country of Origin | As labeled by Cummins (varies by batch) |
Frequently Asked Questions
WHAT DOES THE CUMMINS 3900625 BOLT ACTUALLY DO?
This bolt secures the grid heater wiring harness and ensures proper electrical contact for cold-start heating.
IS THIS A GENUINE CUMMINS FASTENER?
Yes — CPP Diesel only supplies new, genuine Cummins OEM hardware for critical electrical applications.
CAN I USE A STANDARD HARDWARE-STORE BOLT?
No. Standard bolts do not match the metallurgy, flange design, or clamp load requirements of the Cummins heater assembly.
DOES THIS FIT BOTH 5.9L AND 6.7L CUMMINS?
Yes. It is used across 2003–2007 5.9L and 2007.5–2013 6.7L engines where applicable. Always confirm by VIN/ESN.
SHOULD I REPLACE MULTIPLE BOLTS AT ONCE?
For consistent clamp load and reliability, it is recommended to replace intake heater hardware in sets.
