The Muffler,exhaust, cataloged under National Stock Number 2990-00-936-8172, 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 17 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-00-936-8172 |
| Primary Part Number | MAM04-5054 |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Donaldson Company, Inc. |
| Status | ACTIVE |
| Inlet Flange Shape | RECTANGLE SINGLE INLET |
| Inlet Location | OFFSET LOCATED ON END OF BODY |
| Overall Diameter | 4.375 INCHES NOMINAL IN |
| Center to Center Distance Between Mounting Holes | HOLES SPACED 1.300 IN. BY 0.750 IN. APART SINGLE INLET IN |
| Outlet Inside Diameter | 1.000 INCHES NOMINAL FIRST OUTLET IN |
| Inlet Projection Length | 1.375 INCHES NOMINAL SINGLE INLET IN |
| Inlet Flange Mounting Hole Diameter | 0.281 INCHES NOMINAL SINGLE INLET IN |
| Inlet Connection Type | FLANGE SINGLE INLET |
| Body Shape | ROUND |
| Inlet Flange Mounting Provision and Quantity | 4 HOLES SINGLE INLET |
| Unable to Decode | UNABLE TO DECODE |
| Surface Treatment | ALUMINUM |
| Inlet Inside Diameter | 1.000 INCHES NOMINAL SINGLE INLET IN |
| Material | STEEL LOCATION NOT OTHERWISE SPECIFIED |
| Outlet Projection Length | 1.812 INCHES NOMINAL FIRST OUTLET IN |
| Outlet Connection Type | UNTHREADED FIRST OUTLET |
| Outlet Location | LOCATED ON SIDE 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 |
|---|---|
| MAM04-5054 PRIMARY | Donaldson Company, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 13200E8867 | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 2990-00-936-8172 is a Muffler,exhaust, manufactured by Donaldson Company, Inc., classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-00-936-8172 has 1 manufacturer part number on file: MAM04-5054 (Donaldson Company, Inc.).
Key specifications for MAM04-5054: Inlet Flange Shape: RECTANGLE SINGLE INLET; Inlet Location: OFFSET LOCATED ON END OF BODY; Overall Diameter: 4.375 INCHES NOMINAL IN; Center to Center Distance Between Mounting Holes: HOLES SPACED 1.300 IN. BY 0.750 IN. APART SINGLE INLET IN. 17 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.