The Muffler,exhaust, cataloged under National Stock Number 2990-01-057-3701, is classified within Federal Supply Class 2990 (No Item Name Available) of the Engine Accessories group. The primary manufacturer of record is Walker Mfg Co. Government technical data includes 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 19 commercial cross-references from 12 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 2990-01-057-3701 |
| Primary Part Number | 21475 |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — No Item Name Available |
| Manufacturer | Walker Mfg Co |
| Status | CANCELLED |
| Design Type | DRY |
| Muffler Design | BAFFLE |
| Overall Diameter | 6.500 INCHES NOMINAL IN |
| Outlet Projection Length | 3.938 INCHES NOMINAL FIRST OUTLET IN |
| Inlet Connection Type | UNTHREADED SINGLE INLET |
| Coolant Type | AIR |
| Outlet Outside Diameter | 2.500 INCHES NOMINAL FIRST OUTLET IN |
| Outlet Location | OFFSET IN END SECTION OF BODY 1.500 IN C OF OUTLET TO C OF BODY IN |
| Body Shape | ROUND |
| Inlet Projection Length | 3.938 INCHES NOMINAL SINGLE INLET IN |
| Inlet Inside Diameter | 2.500 INCHES NOMINAL SINGLE INLET IN |
| Material | STEEL LOCATION NOT OTHERWISE SPECIFIED |
| Outlet Connection Type | UNTHREADED FIRST OUTLET |
| Surface Treatment | ALUMINUM ALLOY |
| Inlet Location | OFFSET IN END SECTION OF BODY 1.500 IN. C OF INLET TO C OF BODY IN |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 01306100B0 | Tld Wollard Llc (USA) |
| 3954017 | General Motors Corp (USA) |
| 21475 PRIMARY | Walker Mfg Co (USA) |
| 21328 PRIMARY | Walker Mfg Co (USA) |
| 2428242 | General Motors Llc Dba General Motors Llc (USA) |
| 3954017 | General Motors Llc Dba General Motors Llc (USA) |
| 190-9700 PRIMARY | Stemco Inc Sub of Coltec Industries Inc (USA) |
| 1871 PRIMARY | Arvin Industries Inc (USA) |
| 3850424 | General Motors Corp Chevrolet Motor Div Special Products Dept (USA) |
| 9700 | Stemco Inc Sub of Coltec Industries Inc (USA) |
| 2428242 | Military Vehicles Opn General Motors Truck and Bus Group Ms 2603-02 (USA) |
| MZM06-5024 | Donaldson Company, Inc. (USA) |
| 5733 | Walker Mfg Co (USA) |
| MZM06-5065 PRIMARY | Donaldson Company, Inc. (USA) |
| M21475 PRIMARY | Tld Wollard Llc (USA) |
| 3954017 | General Motors Corp Chevrolet Motor Div Special Products Dept (USA) |
| CH90 PRIMARY | Maremont Corp (USA) |
| CH90 | General Dynamics - Ots, Inc. (USA) |
| 2126048 PRIMARY | Lmc Operating Corp (USA) |
NSN 2990-01-057-3701 is a Muffler,exhaust, manufactured by Walker Mfg Co, classified under FSC 2990 (No Item Name Available). Status: cancelled.
NSN 2990-01-057-3701 has 19 cross-referenced part numbers: 01306100B0 (Tld Wollard Llc), 3954017 (General Motors Corp), 21475 (Walker Mfg Co), 21328 (Walker Mfg Co), 2428242 (General Motors Llc Dba General Motors Llc) and 14 more.
There are 12 known substitutes for 2990-01-057-3701: 6625-00-020-0103, 5999-00-035-7822, 2010-00-036-5698 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 21475: Design Type: DRY; Muffler Design: BAFFLE; Overall Diameter: 6.500 INCHES NOMINAL IN; Outlet Projection Length: 3.938 INCHES NOMINAL FIRST OUTLET IN. 16 total characteristics are documented in the Federal Logistics Information System.
NSN 2990-01-057-3701 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.