The Muffler,exhaust, cataloged under National Stock Number 2990-00-859-5437, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Harco Manufacturing Company Div Harco Manufacturing Company Inc. Government technical data includes 19 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 | 2990-00-859-5437 |
| Primary Part Number | SAM69-3VSS |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Harco Manufacturing Company Div Harco Manufacturing Company Inc |
| Status | ACTIVE |
| Operating Position | VERTICAL |
| Inlet Outside Diameter | 3.096 INCHES NOMINAL SINGLE INLET IN |
| Inlet Location | LOCATED CENTER OF END OF BODY |
| Coolant Type | AIR |
| Design Type | DRY |
| Overall Diameter | 8.500 INCHES NOMINAL IN |
| Outlet Inside Diameter | 2.904 INCHES NOMINAL FIRST OUTLET IN |
| Inlet Projection Length | 3.000 INCHES NOMINAL SINGLE INLET IN |
| Baffle Quantity | 2 |
| Muffler Design | BAFFLE W/INTEGRAL SPARK ARRESTOR |
| Outlet Outside Diameter | 3.000 INCHES NOMINAL FIRST OUTLET IN |
| Tube Quantity | 1 |
| Inlet Connection Type | UNTHREADED SINGLE INLET |
| Body Shape | ROUND |
| Inlet Inside Diameter | 3.000 INCHES NOMINAL SINGLE INLET IN |
| Material | STEEL CORROSION RESISTING LOCATION NOT OTHERWISE SPECIFIED |
| Outlet Projection Length | 3.188 INCHES NOMINAL FIRST OUTLET IN |
| Outlet Connection Type | UNTHREADED FIRST OUTLET |
| Outlet Location | LOCATED CENTER OF END 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 |
| Part Number | Manufacturer |
|---|---|
| SAM69-3VSS PRIMARY | Harco Manufacturing Company Div Harco Manufacturing Company Inc (USA) |
NSN 2990-00-859-5437 is a Muffler,exhaust, manufactured by Harco Manufacturing Company Div Harco Manufacturing Company Inc, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-00-859-5437 has 1 manufacturer part number on file: SAM69-3VSS (Harco Manufacturing Company Div Harco Manufacturing Company Inc).
Key specifications for SAM69-3VSS: Operating Position: VERTICAL; Inlet Outside Diameter: 3.096 INCHES NOMINAL SINGLE INLET IN; Inlet Location: LOCATED CENTER OF END OF BODY; Coolant Type: AIR. 19 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.