The Muffler,exhaust, cataloged under National Stock Number 2990-01-345-1196, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 2990-01-345-1196 |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Status | ACTIVE |
| Coolant Type | AIR |
| Design Type | DRY |
| Overall Diameter | 0.750 INCHES NOMINAL IN |
| Outlet Thread Direction | RIGHT-HAND FIRST OUTLET |
| Outlet Thread Series Designator | NPT FIRST OUTLET |
| Muffler Design | STRAIGHT THROUGH |
| Thread Location | EXTERNAL FIRST OUTLET |
| Body Shape | ROUND |
| Material | ALUMINUM ALLOY AND STEEL CORROSION RESISTING LOCATION NOT OTHERWISE SPECIFIED |
| Outlet Projection Length | 0.600 INCHES NOMINAL FIRST OUTLET IN |
| Outlet Connection Type | THREADED FIRST OUTLET |
| Outlet Location | CENTRALLY LOCATED IN BOTTOM OF ITEM |
| 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 |
|---|---|
| 6022518-1 | 5/9 Secondary reference Naval Sea Systems Command |
| QE-250 | 5/9 Secondary reference Hutchinson Aerospace & Industry, Inc. Dba Vlier Div Vlier |
| 6022518 | 7/1 Vendor item drawing reference Naval Sea Systems Command |
| D28-0153028 | 3/2 Design control — primary reference U.S. Government activity |
NSN 2990-01-345-1196 is a Muffler,exhaust, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
Key specifications for 2990-01-345-1196: Coolant Type: AIR; Design Type: DRY; Overall Diameter: 0.750 INCHES NOMINAL IN; Outlet Thread Direction: RIGHT-HAND FIRST OUTLET. 12 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.