The Muffler,exhaust, cataloged under National Stock Number 2990-00-734-2371, 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 19 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-00-734-2371 |
| Primary Part Number | 7342371 |
| 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 |
| Inlet Outside Diameter | 2.625 INCHES NOMINAL SINGLE INLET IN |
| Inlet Location | CENTRALLY LOCATED IN END SECTION OF BODY |
| Coolant Type | AIR |
| Design Type | DRY |
| Overall Diameter | 5.875 INCHES MINIMUM AND 6.125 INCHES MAXIMUM IN |
| Outlet Inside Diameter | 2.005 INCHES MINIMUM AND 2.010 INCHES MAXIMUM FIRST OUTLET IN |
| Inlet Projection Length | 1.250 INCHES NOMINAL SINGLE INLET IN |
| Baffle Quantity | 1 |
| Muffler Design | BAFFLE |
| Outlet Outside Diameter | 2.125 INCHES NOMINAL FIRST OUTLET IN |
| Tube Quantity | 1 |
| Inlet Connection Type | UNTHREADED SINGLE INLET |
| Body Shape | ROUND |
| Inlet Inside Diameter | 2.505 INCHES MINIMUM AND 2.510 INCHES MAXIMUM 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 |
|---|---|
| 7342371 | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| 2182060 | General Motors Corp (USA) |
| Reference | Meaning |
|---|---|
| GM42-3 | 5/9 Secondary reference U.S. Government activity |
| 2182060 | 3/9 Design control — primary reference Military Vehicles Opn General Motors Truck and Bus Group Ms 2603-02 |
| GM42-3 | 5/9 Secondary reference U.S. Government activity |
| 2182060 | C/1 Advisory reference — outside the item-of-supply concept General Motors Llc Dba General Motors Llc |
NSN 2990-00-734-2371 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 2990-00-734-2371 has 2 manufacturer part numbers on file: 7342371 (U S Army Tank Automotive Command Amsta-Im-Mm), 2182060 (General Motors Corp).
2 possible matches (shared part number, not a government interchangeability claim): 2840-01-139-2425, 5340-01-527-5254. Verify interchangeability with system specifications before substitution.
Key specifications for 7342371: Operating Position: HORIZONTAL; Inlet Outside Diameter: 2.625 INCHES NOMINAL SINGLE INLET IN; Inlet Location: CENTRALLY LOCATED IN END SECTION OF BODY; Coolant Type: AIR. 19 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.