The Muffler,exhaust, cataloged under National Stock Number 2990-00-903-8324, 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 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 22 commercial cross-references from 15 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 | 2990-00-903-8324 |
| Primary Part Number | 21331 |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — No Item Name Available |
| Manufacturer | Walker Mfg Co |
| Status | CANCELLED |
| Body Shape | ROUND |
| Inlet Connection Type | UNTHREADED SINGLE INLET |
| Design Type | JACKETED |
| Operating Position | HORIZONTAL |
| Outlet Outside Diameter | 1.812 INCHES NOMINAL FIRST OUTLET IN |
| Outlet Connection Type | UNTHREADED FIRST OUTLET |
| Overall Diameter | 6.000 INCHES NOMINAL IN |
| Inlet Inside Diameter | 2.000 INCHES NOMINAL SINGLE INLET IN |
| Material | STEEL LOCATION NOT OTHERWISE SPECIFIED |
| Outlet Projection Length | 4.312 INCHES NOMINAL FIRST OUTLET IN |
| Material | ASBESTOS INSULATION |
| Inlet Projection Length | 4.312 INCHES NOMINAL SINGLE INLET IN |
| Inlet Location | OFFSET LOCATED ON END OF BODY |
| Tube Quantity | 3 |
| Muffler Design | MULTIPASS |
| Outlet Location | OFFSET LOCATED ON END OF BODY |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 792 | Ap Parts Co Youngstown Div (USA) |
| 21331 PRIMARY | Walker Mfg Co (USA) |
| 3930268H | General Motors Corp Chevrolet Motor Div Special Products Dept (USA) |
| 3890340 | General Motors Corp (USA) |
| 3930269 | General Motors Corp Chevrolet Motor Div Special Products Dept (USA) |
| CH57 | Maremont Corp (USA) |
| 857 | Haviland Arnold Co (USA) |
| 848 | Mahle Aftermarket Inc. Dba Ae Clevite Inc (USA) |
| ABH857 | Ar Bee Corp (USA) |
| 3890340 | General Motors Corp Chevrolet Motor Div Special Products Dept (USA) |
| 26P | International Parts Corp Div of Midas-International Corp (USA) |
| 3848588 | General Motors Corp Chevrolet Motor Div Special Products Dept (USA) |
| 21331 | Balkamp Inc (USA) |
| 792 | Ap Parts Co Industrial Sales Div (USA) |
| 1905 | Arvin Industries Inc (USA) |
| 3930268 | General Motors Corp Chevrolet Motor Div Special Products Dept (USA) |
| 1330 | Walker Mfg Co (USA) |
| 3981946 | General Motors Corp Chevrolet Motor Div Special Products Dept (USA) |
| 3848588 | General Motors Corp (USA) |
| 150 | Merit Industries Inc (USA) |
NSN 2990-00-903-8324 is a Muffler,exhaust, manufactured by Walker Mfg Co, classified under FSC 2990 (No Item Name Available). Status: cancelled.
NSN 2990-00-903-8324 has 22 cross-referenced part numbers: 792 (Ap Parts Co Youngstown Div), 21331 (Walker Mfg Co), 3930268H (General Motors Corp Chevrolet Motor Div Special Products Dept), 3890340 (General Motors Corp), 3930269 (General Motors Corp Chevrolet Motor Div Special Products Dept) and 17 more.
There are 12 known substitutes for 2990-00-903-8324: 2530-00-033-6030, 3110-00-038-5443, 5310-00-096-1723 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 21331: Body Shape: ROUND; Inlet Connection Type: UNTHREADED SINGLE INLET; Design Type: JACKETED; Operating Position: HORIZONTAL. 17 total characteristics are documented in the Federal Logistics Information System.
NSN 2990-00-903-8324 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.