The Muffler,exhaust, cataloged under National Stock Number 2990-01-497-0407, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Harco Manufacturing Company Div Harco Manufacturing Company Inc. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-01-497-0407 |
| Primary Part Number | 2674VRSA-10X8SI-SS |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Harco Manufacturing Company Div Harco Manufacturing Company Inc |
| Status | ACTIVE |
| Coolant Type | AIR |
| Design Type | DRY |
| Outlet Inside Diameter | 8.000 INCHES NOMINAL FIRST OUTLET IN |
| Inlet Flange Mounting Hole Diameter | 10.000 INCHES NOMINAL SINGLE INLET IN |
| Muffler Design | DIRECTIONAL VANE W/INTEGRAL SPARK ARRESTOR |
| 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 |
|---|---|
| 2674VRSA-10X8SI-SS PRIMARY | Harco Manufacturing Company Div Harco Manufacturing Company Inc (USA) |
NSN 2990-01-497-0407 is a Muffler,exhaust, manufactured by Harco Manufacturing Company Div Harco Manufacturing Company Inc, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-01-497-0407 has 1 manufacturer part number on file: 2674VRSA-10X8SI-SS (Harco Manufacturing Company Div Harco Manufacturing Company Inc).
Key specifications for 2674VRSA-10X8SI-SS: Coolant Type: AIR; Design Type: DRY; Outlet Inside Diameter: 8.000 INCHES NOMINAL FIRST OUTLET IN; Inlet Flange Mounting Hole Diameter: 10.000 INCHES NOMINAL SINGLE INLET 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.