The Muffler,exhaust, cataloged under National Stock Number 2990-01-459-0245, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 15 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-01-459-0245 |
| Primary Part Number | 4P2496 |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Operating Position | VERTICAL |
| Inlet Outside Diameter | 1.000 INCHES NOMINAL SINGLE INLET IN |
| Inlet Location | END SECTION |
| Design Type | JACKETED |
| Overall Diameter | 12.000 INCHES NOMINAL IN |
| Outlet Inside Diameter | 4.500 INCHES NOMINAL FIRST OUTLET IN |
| Inlet Projection Length | 3.000 INCHES NOMINAL SINGLE INLET IN |
| Outlet Outside Diameter | 1.500 INCHES NOMINAL FIRST OUTLET IN |
| Inlet Connection Type | UNTHREADED SINGLE INLET |
| Body Shape | ROUND |
| Inlet Inside Diameter | 2.385 INCHES NOMINAL SINGLE INLET IN |
| Material | STEEL CORROSION RESISTING LOCATION NOT OTHERWISE SPECIFIED |
| Outlet Projection Length | 2.875 INCHES NOMINAL FIRST OUTLET IN |
| Outlet Connection Type | UNTHREADED FIRST OUTLET |
| Outlet Location | LOCATED CENTERLINE 1/2IN.FROM END IN |
| 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 |
|---|---|
| 4P2496 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
NSN 2990-01-459-0245 is a Muffler,exhaust, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-01-459-0245 has 1 manufacturer part number on file: 4P2496 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 4P2496: Operating Position: VERTICAL; Overall Height: 4.500 INCHES NOMINAL IN; Inlet Outside Diameter: 1.000 INCHES NOMINAL SINGLE INLET IN; Inlet Location: END SECTION. 15 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.