The Muffler,exhaust, cataloged under National Stock Number 2990-00-183-7334, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Cummins Filtration Inc.. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-00-183-7334 |
| Primary Part Number | 86140-M |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Cummins Filtration Inc. |
| Status | ACTIVE |
| Inlet Location | OFFSET ON END SECTION OF BODY |
| Coolant Type | AIR |
| Design Type | DRY |
| Overall Diameter | 7.120 INCHES NOMINAL IN |
| Outlet Inside Diameter | 2.255 INCHES MINIMUM AND 2.275 INCHES MAXIMUM FIRST OUTLET IN |
| Inlet Projection Length | 2.500 INCHES NOMINAL SINGLE INLET IN |
| Baffle Quantity | 2 |
| Muffler Design | BAFFLE |
| Tube Quantity | 2 |
| Inlet Connection Type | UNTHREADED SINGLE INLET |
| Body Shape | ROUND |
| Surface Treatment | ALUMINUM ALLOY |
| Inlet Inside Diameter | 2.755 INCHES MINIMUM AND 2.775 INCHES MAXIMUM SINGLE INLET IN |
| Material | STEEL LOCATION NOT OTHERWISE SPECIFIED |
| Outlet Projection Length | 2.500 INCHES NOMINAL FIRST OUTLET IN |
| Outlet Connection Type | UNTHREADED FIRST OUTLET |
| Outlet Location | OFFSET ON END SECTION OF BODY |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 86140-M PRIMARY | Cummins Filtration Inc. (USA) |
| 3954020 | General Motors Llc Dba General Motors Llc (USA) |
| CH83 W/S225 PRIMARY | Maremont Corp (USA) |
| 21152 AND 35951 PRIMARY | Walker Mfg Co (USA) |
| T-86140 | Cummins Filtration Inc. (USA) |
| Reference | Meaning |
|---|---|
| 3954020 | 5/9 Secondary reference Military Vehicles Opn General Motors Truck and Bus Group Ms 2603-02 |
| 3607 | 5/9 Secondary reference U.S. Government activity |
| 3954020 | 5/9 Secondary reference General Motors Corp |
NSN 2990-00-183-7334 is a Muffler,exhaust, manufactured by Cummins Filtration Inc., classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-00-183-7334 has 5 manufacturer part numbers on file: 86140-M (Cummins Filtration Inc.), 3954020 (General Motors Llc Dba General Motors Llc), CH83 W/S225 (Maremont Corp), 21152 AND 35951 (Walker Mfg Co), T-86140 (Cummins Filtration Inc.).
Key specifications for 86140-M: Inlet Location: OFFSET ON END SECTION OF BODY; Coolant Type: AIR; Design Type: DRY; Overall Diameter: 7.120 INCHES NOMINAL IN. 17 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.