The Muffler,exhaust, cataloged under National Stock Number 2990-01-323-6030, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Lombardini U.s.a., Inc. Government technical data includes 9 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-01-323-6030 |
| Primary Part Number | 5460-290 |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Lombardini U.s.a., Inc |
| Status | ACTIVE |
| Inlet Flange Shape | RECTANGLE SINGLE INLET |
| Operating Position | HORIZONTAL |
| Inlet Location | LOCATED ON HORIZONTAL CENTERLINE CLOSE TO ONE END |
| Design Type | DRY |
| Inlet Connection Type | FLANGE SINGLE INLET |
| Body Shape | RECTANGULAR |
| Inlet Flange Mounting Provision and Quantity | 3 HOLES SINGLE INLET |
| 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 |
|---|---|
| 500-92145 | M-B Companies, Inc (USA) |
| 5460-290 PRIMARY | Lombardini U.s.a., Inc (USA) |
| Reference | Meaning |
|---|---|
| 5460.256 | 5/9 Secondary reference M-B Companies, Inc |
| 5460.256 | 5/9 Secondary reference Lombardini U.s.a., Inc |
| 5460.256 | 5/9 Secondary reference Engine Power, Inc. Dba Engine Power Inc |
NSN 2990-01-323-6030 is a Muffler,exhaust, manufactured by Lombardini U.s.a., Inc, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-01-323-6030 has 2 manufacturer part numbers on file: 500-92145 (M-B Companies, Inc), 5460-290 (Lombardini U.s.a., Inc).
Key specifications for 5460-290: Inlet Flange Shape: RECTANGLE SINGLE INLET; Operating Position: HORIZONTAL; Inlet Location: LOCATED ON HORIZONTAL CENTERLINE CLOSE TO ONE END; Design Type: DRY. 9 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.