Product Description
Interstate-McBee M-3906619 Plug, Pipe 1/8" NPT — 95–97 5.9L Cummins (Aftermarket Replacement)
Quality 1/8" NPT pipe plug used in various engine gallery locations on the 1995–1997 Dodge Ram 2500/3500 with the 5.9L Cummins 12-valve (6BT). Built to OE-style form and function for dependable sealing. Sold individually.
- Direct replacement: OE-style pipe plug for B-Series Cummins applications.
- Standard taper thread: 1/8"-27 NPT for common oil/coolant/air gallery ports.
- Service friendly: Use with appropriate thread sealant for a leak-free install.
- Value: Interstate-McBee quality at a competitive price.
Specifications
| Brand | Interstate-McBee |
| Part Number | M-3906619 |
| OEM Reference | Cummins 3906619 |
| Thread Size / Type | 1/8" NPT (27 TPI, tapered) |
| Material/Finish | Steel plug (finish may vary by lot) |
| Sold As | Each (1 plug) |
| Typical Locations | Oil/coolant/air gallery ports as specified by the service manual |
What’s Included
- (1) Pipe plug, 1/8" NPT — P/N M-3906619
Vehicle Fitment
Always verify by engine serial number (ESN) or parts catalog for exact location and quantity.
- Dodge Ram 2500/3500 with 5.9L Cummins (12-valve 6BT)
- Model Years: 1995–1997
- Additional B-Series applications where Cummins 3906619 is specified (confirm by ESN).
Install Notes
- Clean threads and mating port thoroughly; remove old sealant and debris.
- Apply a diesel-safe thread sealant (paste or PTFE tape) suitable for the fluid in that circuit.
- Thread in by hand to avoid cross-threading; tighten to specification in the service manual.
- Do not overtighten—NPT plugs seal on the taper.
- Verify for leaks after initial run-up/heat cycle and recheck torque if required.
Why Buy From CPP Diesel
- ESN-verified fitment help from diesel specialists
- Fast shipping and easy returns
- Huge inventory of complementary Cummins B-Series service parts
FAQ
Is this the correct plug for my engine?
If your parts catalog or ESN lookup calls out Cummins 3906619 for a 1/8" NPT plug, this Interstate-McBee M-3906619 is the correct aftermarket replacement.
How many do I need?
Quantity varies by engine configuration and the specific gallery locations being serviced. Check your service manual or teardown notes.
Do I need sealant?
Yes. Use a compatible thread sealant (paste or PTFE tape) appropriate for oil, coolant, or air as applicable.
