The Muffler,exhaust, cataloged under National Stock Number 2990-00-620-0157, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Wisconsin Motors, Llc. Government technical data includes 16 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 | 2990-00-620-0157 |
| Primary Part Number | WD64A |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Wisconsin Motors, Llc |
| Status | ACTIVE |
| Inlet Location | CENTRALLY LOCATED IN END SECTION OF BODY |
| Coolant Type | AIR |
| Design Type | DRY |
| Overall Diameter | 3.250 INCHES NOMINAL IN |
| Inlet Thread Location | INTERNAL SINGLE INLET |
| Muffler Design | STRAIGHT THROUGH |
| Inlet Connection Type | THREADED SINGLE INLET |
| Thread Direction | RIGHT-HAND SINGLE INLET |
| Body Shape | ROUND |
| Nonconnection Outlet Location | CENTRALLY LOCATED IN END SECTION OF BODY |
| Nonconnection Outlet Type and Quantity | 1 PERFORATED |
| Inlet Thread Size | 1.000-11-1/2 SINGLE INLET |
| Nonconnection Outlet Size | AB76; 0.125 IN DIA IN |
| Inlet Thread Series Designator | NPT SINGLE INLET |
| Surface Treatment | ALUMINUM |
| 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 |
|---|---|
| WD64A PRIMARY | Wisconsin Motors, Llc (USA) |
NSN 2990-00-620-0157 is a Muffler,exhaust, manufactured by Wisconsin Motors, Llc, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-00-620-0157 has 1 manufacturer part number on file: WD64A (Wisconsin Motors, Llc).
Key specifications for WD64A: Inlet Location: CENTRALLY LOCATED IN END SECTION OF BODY; Coolant Type: AIR; Design Type: DRY; Overall Diameter: 3.250 INCHES NOMINAL IN. 16 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.