The Muffler,exhaust, cataloged under National Stock Number 2990-00-412-1939, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Briggs and Stratton Corp. Government technical data includes 6 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-00-412-1939 |
| Primary Part Number | 297274 |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Briggs and Stratton Corp |
| Status | ACTIVE |
| Coolant Type | AIR |
| Design Type | DRY |
| Muffler Design | STRAIGHT THROUGH |
| Body Shape | RECTANGULAR |
| Surface Treatment | ENAMEL |
| Material | STEEL LOCATION NOT OTHERWISE SPECIFIED |
| 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 |
|---|---|
| 494585 | Guinault (FRA) |
| 494585 | Briggs and Stratton Corp (USA) |
| 297274 PRIMARY | Briggs and Stratton Corp (USA) |
| Reference | Meaning |
|---|---|
| 297274 | 5/9 Secondary reference U.S. Government activity |
| 157-052 | 5/9 Secondary reference Power Lawnmower Parts Inc |
NSN 2990-00-412-1939 is a Muffler,exhaust, manufactured by Briggs and Stratton Corp, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-00-412-1939 has 3 manufacturer part numbers on file: 494585 (Guinault), 494585 (Briggs and Stratton Corp), 297274 (Briggs and Stratton Corp).
1 possible match (shared part number, not a government interchangeability claim): 5935-01-347-6417. Verify interchangeability with system specifications before substitution.
Key specifications for 297274: Overall Height: 1.500 INCHES NOMINAL IN; Coolant Type: AIR; Design Type: DRY; Overall Length: 4.000 INCHES NOMINAL IN. 6 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.