The Muffler,exhaust, cataloged under National Stock Number 2990-00-141-9960, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. Government technical data includes 18 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-00-141-9960 |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Status | ACTIVE |
| Operating Position | HORIZONTAL |
| FSC Application Data | 1. MUFFLER,ENGINE,GASOLINE RECIPROCATING,NONAIRCRAFT |
| Inlet Outside Diameter | 2.070 INCHES MINIMUM AND 2.080 INCHES MAXIMUM SINGLE INLET IN |
| Inlet Location | CENTRALLY LOCATED IN END SECTION OF BODY AND CENTRALLY LOCATED ON OPPOSITE END IN END SECTION OF BODY |
| Coolant Type | AIR |
| Design Type | DRY |
| Overall Diameter | 3.040 INCHES NOMINAL IN |
| Outlet Inside Diameter | 2.060 INCHES MINIMUM AND 2.080 INCHES MAXIMUM FIRST OUTLET IN |
| Inlet Projection Length | 1.000 INCHES NOMINAL FIRST INLET IN |
| Inlet Projection Length | 1.000 INCHES NOMINAL SECOND INLET IN |
| Baffle Quantity | 1 |
| Muffler Design | BAFFLE |
| Outlet Outside Diameter | 1.990 INCHES MINIMUM AND 2.010 INCHES MAXIMUM FIRST OUTLET IN |
| Tube Quantity | 1 |
| Inlet Inside Diameter | 2.000 INCHES MINIMUM AND 2.010 INCHES MAXIMUM SINGLE INLET IN |
| Material | STEEL LOCATION NOT OTHERWISE SPECIFIED |
| Outlet Projection Length | 7.250 INCHES NOMINAL FIRST OUTLET IN |
| Outlet Location | LOCATED ON SIDE OF BODY 5-1/2 IN. FROM END,CENTERLINE OF EXHAUST OUTLET IS AT A 45 DEG ANGLE FROM HORIZONTAL AXIS OF BODY IN |
| 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 |
|---|---|
| 62924 | 3/2 Design control — primary reference U.S. Government activity |
NSN 2990-00-141-9960 is a Muffler,exhaust, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
Key specifications for 2990-00-141-9960: Operating Position: HORIZONTAL; FSC Application Data: 1. MUFFLER,ENGINE,GASOLINE RECIPROCATING,NONAIRCRAFT; Inlet Outside Diameter: 2.070 INCHES MINIMUM AND 2.080 INCHES MAXIMUM SINGLE INLET IN; Inlet Location: CENTRALLY LOCATED IN END SECTION OF BODY AND CENTRALLY LOCATED ON OPPOSITE END IN END SECTION OF BODY. 18 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.