The Muffler,exhaust, cataloged under National Stock Number 2990-01-473-7412, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. Government technical data includes 8 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-01-473-7412 |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Status | ACTIVE |
| Design Type | DRY |
| Overall Diameter | 9.000 INCHES NOMINAL IN |
| Muffler Design | STRAIGHT THROUGH |
| Inlet Connection Type | UNTHREADED SINGLE INLET |
| Body Shape | ROUND |
| Surface Treatment | ALUMINUM ALLOY |
| Material | STEEL LOCATION NOT OTHERWISE SPECIFIED |
| Outlet Connection Type | UNTHREADED FIRST OUTLET |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| M100740 | 5/9 Secondary reference Vickers Truck Equipment Co |
| 87-500-130 | 3/2 Design control — primary reference U.S. Government activity |
NSN 2990-01-473-7412 is a Muffler,exhaust, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5315-01-626-3053. Verify interchangeability with system specifications before substitution.
Key specifications for 2990-01-473-7412: Design Type: DRY; Overall Diameter: 9.000 INCHES NOMINAL IN; Overall Length: 16.5000 INCHES NOMINAL IN; Muffler Design: STRAIGHT THROUGH. 8 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.