The Muffler,exhaust, cataloged under National Stock Number 2990-00-678-3241, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 22 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 2990-00-678-3241 |
| Primary Part Number | 7331260 |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Operating Position | HORIZONTAL |
| FSC Application Data | 1. EXHAUST SYSTEM,ENGINE NONAIRCRAFT |
| Inlet Outside Diameter | 2.000 INCHES NOMINAL SINGLE INLET IN |
| Inlet Location | CENTRALLY LOCATED IN END SECTION OF BODY |
| Coolant Type | AIR |
| Design Type | DRY |
| Overall Diameter | 4.000 INCHES NOMINAL IN |
| Outlet Inside Diameter | 1.875 INCHES NOMINAL FIRST OUTLET IN |
| Inlet Projection Length | 0.625 INCHES NOMINAL SINGLE INLET IN |
| Baffle Quantity | 3 |
| Muffler Design | BAFFLE |
| Outlet Outside Diameter | 2.000 INCHES NOMINAL FIRST OUTLET IN |
| Tube Quantity | 1 |
| Inlet Connection Type | UNTHREADED SINGLE INLET |
| Body Shape | ROUND |
| Outlet Integral Tail Pipe Length | 16.750 INCHES NOMINAL FIRST OUTLET IN |
| Surface Treatment | ALUMINUM |
| Inlet Inside Diameter | 1.875 INCHES NOMINAL SINGLE INLET IN |
| Material | STEEL LOCATION NOT OTHERWISE SPECIFIED |
| Outlet Projection Length | 1.500 INCHES NOMINAL FIRST OUTLET IN |
| Outlet Connection Type | UNTHREADED FIRST OUTLET |
| Outlet Location | CENTRALLY LOCATED IN 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 |
|---|---|
| 7331260 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 2990006783241 | 5/9 Secondary reference E.c.a Etablissement Centrald'approvisionnement Des Forces Armee |
NSN 2990-00-678-3241 is a Muffler,exhaust, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-00-678-3241 has 1 manufacturer part number on file: 7331260 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 7331260: Operating Position: HORIZONTAL; FSC Application Data: 1. EXHAUST SYSTEM,ENGINE NONAIRCRAFT; Inlet Outside Diameter: 2.000 INCHES NOMINAL SINGLE INLET IN; Inlet Location: CENTRALLY LOCATED IN END SECTION OF BODY. 22 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.