The Muffler,exhaust, cataloged under National Stock Number 2990-01-016-9611, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. Government technical data includes 10 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-01-016-9611 |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Status | ACTIVE |
| Inlet Location | CENTRALLY LOCATED IN END SECTION OF BODY |
| Outlet Flange Mounting Provision and Quantity | 4 HOLES FIRST OUTLET |
| Inlet Thread Location | INTERNAL SINGLE INLET |
| Outlet Flange Shape | SQUARE FIRST OUTLET |
| Inlet Connection Type | THREADED SINGLE INLET |
| Body Shape | ROUND |
| Inlet Thread Size | 2-1/2-8 SINGLE INLET |
| Inlet Thread Series Designator | NPT SINGLE INLET |
| Outlet Connection Type | FLANGE FIRST OUTLET |
| Outlet Location | CENTRALLY LOCATED IN END SECTION OF BODY |
| 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 |
|---|---|
| CB57-42282 | D/9 Drawing number reference only U.S. Government activity |
| CB57-42243 | D/9 Drawing number reference only U.S. Government activity |
| CB57-42282-10 | 3/9 Design control — primary reference U.S. Government activity |
| CB57-42243PC3 | 5/9 Secondary reference U.S. Government activity |
NSN 2990-01-016-9611 is a Muffler,exhaust, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
Key specifications for 2990-01-016-9611: Inlet Location: CENTRALLY LOCATED IN END SECTION OF BODY; Outlet Flange Mounting Provision and Quantity: 4 HOLES FIRST OUTLET; Inlet Thread Location: INTERNAL SINGLE INLET; Outlet Flange Shape: SQUARE FIRST OUTLET. 10 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.