The Muffler,exhaust, cataloged under National Stock Number 2990-01-399-0859, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Donaldson Company, Inc.. Government technical data includes 4 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-01-399-0859 |
| Primary Part Number | M065073 |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Donaldson Company, Inc. |
| Status | ACTIVE |
| Overall Diameter | 167.6 MILLIMETERS NOMINAL MM |
| Muffler Design | STRAIGHT THROUGH |
| Inlet Connection Type | FLANGE SINGLE INLET |
| Body Shape | ROUND |
| 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 |
|---|---|
| M065073 | Donaldson Company, Inc. (USA) |
| Reference | Meaning |
|---|---|
| MMBM06-5073 | 5/9 Secondary reference Donaldson Company, Inc. |
| MMBM06-5073 | 5/9 Secondary reference Cummins Filtration Inc. |
| 2797468 | 3/2 Design control — primary reference U.S. Government activity |
NSN 2990-01-399-0859 is a Muffler,exhaust, manufactured by Donaldson Company, Inc., classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-01-399-0859 has 1 manufacturer part number on file: M065073 (Donaldson Company, Inc.).
Key specifications for M065073: Overall Diameter: 167.6 MILLIMETERS NOMINAL MM; Overall Length: 546.1 MILLIMETERS NOMINAL MM; Muffler Design: STRAIGHT THROUGH; Inlet Connection Type: FLANGE SINGLE INLET. 4 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.