The Muffler,exhaust, cataloged under National Stock Number 2990-01-511-4749, 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 16 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-01-511-4749 |
| Primary Part Number | 28951A |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Cummins Filtration Inc. |
| Status | ACTIVE |
| Inlet Flange Shape | ROUND SINGLE INLET |
| Inlet Location | OFFSET IN RIGHT END SECTION OF BODY |
| Coolant Type | WATER |
| Overall Diameter | 12.120 INCHES NOMINAL IN |
| Inlet Projection Length | 2.520 INCHES NOMINAL SINGLE INLET IN |
| Inlet Flange Mounting Hole Diameter | 5.040 INCHES NOMINAL SINGLE INLET IN |
| Muffler Design | STRAIGHT THROUGH |
| Outlet Outside Diameter | 5.000 INCHES NOMINAL FIRST OUTLET IN |
| Outlet Flange Shape | ROUND FIRST OUTLET |
| Inlet Connection Type | FLANGE SINGLE INLET |
| Body Shape | ROUND |
| Surface Treatment | ALUMINUM |
| Inlet Inside Diameter | 5.040 INCHES NOMINAL SINGLE INLET IN |
| Material | STEEL CORROSION RESISTING LOCATION NOT OTHERWISE SPECIFIED |
| Outlet Connection Type | FLANGE FIRST OUTLET |
| Outlet Location | ON HORIZONTAL CENTERLINE IN LEFT 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 |
|---|---|
| 28951A PRIMARY | Cummins Filtration Inc. (USA) |
| 12485675 | Bae Systems Tactical Vehicle Systems Lp Dba Data Systems International Inc (USA) |
| 12485675 | Amz Alabama Inc. (USA) |
| Reference | Meaning |
|---|---|
| 12485675 | 7/2 Vendor item drawing reference U S Army Tank Automotive Command Amsta-Im-Mm |
NSN 2990-01-511-4749 is a Muffler,exhaust, manufactured by Cummins Filtration Inc., classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-01-511-4749 has 3 manufacturer part numbers on file: 28951A (Cummins Filtration Inc.), 12485675 (Bae Systems Tactical Vehicle Systems Lp Dba Data Systems International Inc), 12485675 (Amz Alabama Inc.).
Key specifications for 28951A: Inlet Flange Shape: ROUND SINGLE INLET; Inlet Location: OFFSET IN RIGHT END SECTION OF BODY; Coolant Type: WATER; Overall Diameter: 12.120 INCHES NOMINAL IN. 16 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.