The Muffler,exhaust, cataloged under National Stock Number 2990-01-254-7562, 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 20 specifications, cited from the U.S. Government catalog. The record lists 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
| Parameter | Value |
|---|---|
| NSN | 2990-01-254-7562 |
| Primary Part Number | BXU01-5070 |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Donaldson Company, Inc. |
| Status | ACTIVE |
| Operating Position | VERTICAL |
| Outlet Thread Size | 1-1/2-11-1/2 FIRST OUTLET |
| Inlet Location | CENTRALLY LOCATED IN END SECTION OF BODY |
| Coolant Type | AIR |
| Design Type | DRY |
| Overall Diameter | 4.400 INCHES NOMINAL IN |
| Outlet Thread Direction | RIGHT-HAND FIRST OUTLET |
| Inlet Thread Location | INTERNAL SINGLE INLET |
| Outlet Thread Series Designator | NPT FIRST OUTLET |
| Muffler Design | STRAIGHT THROUGH |
| Thread Location | INTERNAL FIRST OUTLET |
| Inlet Connection Type | THREADED SINGLE INLET |
| Thread Direction | RIGHT-HAND SINGLE INLET |
| Body Shape | ROUND |
| Inlet Thread Size | 1-1/2-11-1/2 SINGLE INLET |
| Inlet Thread Series Designator | NPT SINGLE INLET |
| Surface Treatment | ALUMINUM ALLOY |
| Material | STEEL LOCATION NOT OTHERWISE SPECIFIED |
| Outlet Connection Type | THREADED FIRST OUTLET |
| Outlet Location | CENTRALLY LOCATED IN TOP SECTION 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 |
|---|---|
| AD39696-1 | Hamilton Sundstrand Corporation Dba Collins Aerospace (USA) |
| BXU01-5070 PRIMARY | Donaldson Company, Inc. (USA) |
| Reference | Meaning |
|---|---|
| AD39696 | D/9 Drawing number reference only Hamilton Sundstrand Corporation Dba Collins Aerospace |
NSN 2990-01-254-7562 is a Muffler,exhaust, manufactured by Donaldson Company, Inc., classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-01-254-7562 has 2 manufacturer part numbers on file: AD39696-1 (Hamilton Sundstrand Corporation Dba Collins Aerospace), BXU01-5070 (Donaldson Company, Inc.).
Key specifications for BXU01-5070: Operating Position: VERTICAL; Outlet Thread Size: 1-1/2-11-1/2 FIRST OUTLET; Inlet Location: CENTRALLY LOCATED IN END SECTION OF BODY; Coolant Type: AIR. 20 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.