Product Description
Interstate-McBee M-3906619 Plug, Pipe 1/8" NPT – 95–97 5.9L Cummins
Precision 1/8" NPT pipe plug engineered as an OEM-style replacement for 1995–1997 Dodge Ram 2500/3500 5.9L Cummins (12-valve) applications. Designed to securely seal engine ports in coolant/oil galleries or accessory fittings, helping prevent leaks and maintain proper system pressure.
- Direct-fit replacement: Matches Cummins 3906619 specification for reliable sealing.
- Durable construction: Built for heat, vibration, and pressure cycling in B-Series engines.
- Versatile use: Suitable for sealing unused ports in engine fluid passages and related fittings.
- Aftermarket value: Interstate-McBee quality at a fraction of OEM boxed pricing.
Specifications
| Interstate-McBee Part | M-3906619 |
|---|---|
| OEM Cross-Reference | Cummins 3906619 |
| Thread | 1/8" NPT (male) |
| Application | Cummins B-Series engine ports (oil/coolant/accessory) |
| Category | Engine sealing / plugs |
Vehicle Fitment
Always verify by engine serial number (ESN) when possible.
- Dodge Ram 2500/3500 with 5.9L Cummins (12-valve)
- Model Years: 1995–1997
- Additional Cummins B-Series applications where 1/8" NPT plugs are specified.
Install Notes
- Clean threads thoroughly; inspect port for damage or debris before installation.
- Apply suitable thread sealant compatible with engine fluid (as specified by Cummins service manual).
- Do not overtighten—tighten to spec to avoid thread distortion or block damage.
Warranty
Interstate-McBee new engine parts typically carry up to 24-month warranty coverage from date of installation. See manufacturer policy for details.
Why Buy From CPP Diesel
- Expert ESN-verified fitment support for B-Series platforms.
- Fast shipping, easy returns, and real diesel techs on the line.
- Curated 5.9L Cummins inventory to simplify your rebuild or refresh.
FAQ
Will this fit my 1995–1997 12-valve 5.9L Cummins?Yes. This 1/8" NPT plug is listed for 1995–1997 Dodge Ram 2500/3500 with the 5.9L 12-valve Cummins. Verify with your ESN for absolute confirmation.
What does 1/8" NPT mean?
NPT is a tapered pipe thread standard. 1/8" NPT indicates the nominal pipe size and thread profile used on many Cummins engine ports.
Where is this plug used?
Commonly used to seal unused or service ports in engine coolant or oil galleries and related fittings on B-Series engines. Refer to the Cummins manual for exact port locations.
Do I need thread sealant?
Yes—use an appropriate thread sealant compatible with engine fluids, per the Cummins service manual.
How does Interstate-McBee compare to OEM?
Interstate-McBee builds OEM-style replacements for form, fit, and function—typically at a lower cost than OEM-boxed parts.
