The Muffler,exhaust, cataloged under National Stock Number 2990-01-669-9521, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Donaldson Company, Inc.. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 — Miscellaneous Engine Accessories, Nonaircraft (FSG 29) |
| Manufacturers | Donaldson Company, Inc. (CAGE 18265); Jlg Industries (australia) Jlg Australia Pty Limited (CAGE Z1DF2); Oshkosh Defense Llc (CAGE 75Q65) |
| Parameter | Value |
|---|---|
| NSN | 2990-01-669-9521 |
| Primary Part Number | M100939 |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Donaldson Company, Inc. |
| 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 |
|---|---|
| M100939 PRIMARY | Donaldson Company, Inc. (USA) |
| 4231387 | Jlg Industries (australia) Jlg Australia Pty Limited (AUS) |
| 4231387 | Oshkosh Defense Llc (USA) |
| Reference | Meaning |
|---|---|
| 4231387 | 5/9 Secondary reference Jlg Industries (australia) Jlg Industries Inc |
NSN 2990-01-669-9521 is a Muffler,exhaust, manufactured by Donaldson Company, Inc., classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-01-669-9521 has 3 manufacturer part numbers on file: M100939 (Donaldson Company, Inc.), 4231387 (Jlg Industries (australia) Jlg Australia Pty Limited), 4231387 (Oshkosh Defense Llc).
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.