The Muffler,exhaust, cataloged under National Stock Number 2990-01-022-4252, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Dressta North America Ltd. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 — Miscellaneous Engine Accessories, Nonaircraft (FSG 29) |
| Manufacturers | Komatsu America Corp. (CAGE 0SAT8); Dressta North America Ltd (CAGE 45RP7); Fabco Welding & Machine, Inc. (CAGE 6TD95) |
| Parameter | Value |
|---|---|
| NSN | 2990-01-022-4252 |
| Primary Part Number | 680811C2 |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Dressta North America Ltd |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 675046C4 | Komatsu America Corp. (USA) |
| 680811C2 PRIMARY | Dressta North America Ltd (USA) |
| 675046C4 | Fabco Welding & Machine, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 680811C2 | 5/9 Secondary reference U.S. Government activity |
| 680811C1 | 5/9 Secondary reference U.S. Government activity |
NSN 2990-01-022-4252 is a Muffler,exhaust, manufactured by Dressta North America Ltd, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-01-022-4252 has 3 manufacturer part numbers on file: 675046C4 (Komatsu America Corp.), 680811C2 (Dressta North America Ltd), 675046C4 (Fabco Welding & Machine, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 2805-01-022-4254. Verify interchangeability with system specifications before substitution.
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.