The Muffler,exhaust, cataloged under National Stock Number 2990-01-479-4606, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Oshkosh Defense Llc. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-01-479-4606 |
| Primary Part Number | 3338739 |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Oshkosh Defense Llc |
| Status | ACTIVE |
| 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 |
|---|---|
| 3338739 PRIMARY | Oshkosh Defense Llc (USA) |
| 29020A | Cummins Filtration Inc. (USA) |
| Reference | Meaning |
|---|---|
| 3338739 | 3/9 Design control — primary reference Oshkosh Corp |
| 3192875 | 5/9 Secondary reference Oshkosh Corp |
| 27916A | 5/9 Secondary reference Cummins Filtration Inc. |
NSN 2990-01-479-4606 is a Muffler,exhaust, manufactured by Oshkosh Defense Llc, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-01-479-4606 has 2 manufacturer part numbers on file: 3338739 (Oshkosh Defense Llc), 29020A (Cummins Filtration Inc.).
1 possible match (shared part number, not a government interchangeability claim): 6145-01-717-5118. Verify interchangeability with system specifications before substitution.
Key specifications for 3338739: End Item Identification: 2320-01-465-2174. 0 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.