The Muffler,exhaust, cataloged under National Stock Number 2990-00-482-4758, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. Government technical data includes 13 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-00-482-4758 |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Status | ACTIVE |
| Inlet Flange Shape | SQUARE SINGLE INLET |
| Operating Position | HORIZONTAL |
| Coolant Type | AIR |
| Design Type | DRY |
| Center to Center Distance Between Mounting Holes | 3-1/4 IN. C TO C DIM OF MTG STUDS SINGLE INLET IN |
| Baffle Quantity | 2 |
| Muffler Design | BAFFLE |
| Outlet Outside Diameter | 2.625 INCHES NOMINAL FIRST OUTLET IN |
| Inlet Connection Type | FLANGE SINGLE INLET |
| Body Shape | OVAL |
| Inlet Flange Mounting Provision and Quantity | 4 HOLES SINGLE INLET |
| Material | STEEL LOCATION NOT OTHERWISE SPECIFIED |
| Outlet Connection Type | UNTHREADED FIRST OUTLET |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| S009-0019 | 5/9 Secondary reference Shay Industries |
| S009-0019 | 3/2 Design control — primary reference U.S. Government activity |
NSN 2990-00-482-4758 is a Muffler,exhaust, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
Key specifications for 2990-00-482-4758: Inlet Flange Shape: SQUARE SINGLE INLET; Operating Position: HORIZONTAL; Overall Height: 6.125 INCHES NOMINAL IN; Coolant Type: AIR. 13 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.