The Muffler,exhaust, cataloged under National Stock Number 2990-00-338-0022, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Asrc Federal Facilities Logistics, Llc. Government technical data includes 18 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-00-338-0022 |
| Primary Part Number | 02131-0581 |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Asrc Federal Facilities Logistics, Llc |
| Status | ACTIVE |
| Operating Position | HORIZONTAL |
| FSC Application Data | MISCELLANEOUS ENGINE ACCESSORIES,NONAIRCRAFT |
| Inlet Outside Diameter | 4.250 INCHES NOMINAL SINGLE INLET IN |
| Inlet Location | CENTRALLY LOCATED IN END SECTION OF BODY |
| Coolant Type | AIR |
| Design Type | JACKETED |
| Overall Diameter | 5.000 INCHES NOMINAL IN |
| Outlet Inside Diameter | 3.880 INCHES NOMINAL FIRST OUTLET IN |
| Inlet Projection Length | 6.250 INCHES NOMINAL SINGLE INLET IN |
| Muffler Design | DIRECTIONAL VANE W/INTEGRAL SPARK ARRESTOR |
| Outlet Outside Diameter | 4.000 INCHES NOMINAL FIRST OUTLET IN |
| Inlet Connection Type | UNTHREADED SINGLE INLET |
| Body Shape | ROUND |
| Inlet Inside Diameter | 4.071 INCHES NOMINAL SINGLE INLET IN |
| Material | STEEL LOCATION NOT OTHERWISE SPECIFIED |
| Outlet Projection Length | 4.750 INCHES NOMINAL FIRST OUTLET IN |
| Outlet Connection Type | UNTHREADED FIRST OUTLET |
| Outlet Location | CENTRALLY LOCATED IN END 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 |
|---|---|
| 02131-0581 | Asrc Federal Facilities Logistics, Llc (USA) |
| Reference | Meaning |
|---|---|
| 9165962 | 3/9 Design control — primary reference Euclid Inc |
| 66C62735 | 5/2 Secondary reference U.S. Government activity |
| 26023-06781 | 5/9 Secondary reference Kaitlin Corp |
| 2131-0581 | 5/9 Secondary reference U.S. Government activity |
| 02131-0581 | 5/9 Secondary reference U.S. Government activity |
NSN 2990-00-338-0022 is a Muffler,exhaust, manufactured by Asrc Federal Facilities Logistics, Llc, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-00-338-0022 has 1 manufacturer part number on file: 02131-0581 (Asrc Federal Facilities Logistics, Llc).
Key specifications for 02131-0581: Operating Position: HORIZONTAL; FSC Application Data: MISCELLANEOUS ENGINE ACCESSORIES,NONAIRCRAFT; Inlet Outside Diameter: 4.250 INCHES NOMINAL SINGLE INLET IN; Inlet Location: CENTRALLY LOCATED IN END SECTION OF BODY. 18 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.