The Muffler,exhaust, cataloged under National Stock Number 2990-00-657-5899, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Walker Mfg Co. Government technical data includes 18 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. 5 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 | 2990-00-657-5899 |
| Primary Part Number | 7353 |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Walker Mfg Co |
| Status | ACTIVE |
| Operating Position | HORIZONTAL |
| FSC Application Data | ENGINE,NON AIRCRAFT |
| Inlet Outside Diameter | 2.156 INCHES MINIMUM AND 2.219 INCHES MAXIMUM SINGLE INLET IN |
| Inlet Location | 2-3/4 IN. C TO C FROM HORIZONTAL CENTERLINE IN |
| Design Type | JACKETED |
| Outlet Inside Diameter | 2.000 INCHES MINIMUM AND 2.006 INCHES MAXIMUM FIRST OUTLET IN |
| Inlet Projection Length | 0.938 INCHES NOMINAL SINGLE INLET IN |
| Muffler Design | MULTIPASS |
| Outlet Outside Diameter | 2.156 INCHES MINIMUM AND 2.219 INCHES MAXIMUM FIRST OUTLET IN |
| Tube Quantity | 2 |
| Inlet Connection Type | UNTHREADED SINGLE INLET |
| Body Shape | OVAL |
| Inlet Inside Diameter | 2.000 INCHES MINIMUM AND 2.006 INCHES MAXIMUM SINGLE INLET IN |
| Material | ASBESTOS INSULATION |
| Material | STEEL LOCATION NOT OTHERWISE SPECIFIED |
| Outlet Projection Length | 0.938 INCHES NOMINAL FIRST OUTLET IN |
| Outlet Connection Type | UNTHREADED FIRST OUTLET |
| Outlet Location | 2-3/4 IN. C TO C FROM HORIZONTAL CENTERLINE IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 2990-00-657-5899 is a Muffler,exhaust, manufactured by Walker Mfg Co, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-00-657-5899 has 3 manufacturer part numbers on file: 6575899 (U S Army Tank Automotive Command Amsta-Im-Mm), 7353 (Walker Mfg Co), T3134 (Cummins Filtration Inc.).
5 possible matches (shared part number, not a government interchangeability claim): 5975-01-058-2257, 5985-01-067-4378, 3030-01-104-2886. Verify interchangeability with system specifications before substitution.
Key specifications for 7353: Operating Position: HORIZONTAL; Overall Height: 5.688 INCHES MINIMUM AND 5.813 INCHES MAXIMUM IN; FSC Application Data: ENGINE,NON AIRCRAFT; Inlet Outside Diameter: 2.156 INCHES MINIMUM AND 2.219 INCHES MAXIMUM SINGLE INLET IN. 18 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.