The Muffler,exhaust, cataloged under National Stock Number 2990-01-101-5431, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Cummins Filtration Inc.. Government technical data includes 16 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 2990-01-101-5431 |
| Primary Part Number | U44130-S |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Cummins Filtration Inc. |
| Status | ACTIVE |
| Operating Position | UNIVERSAL |
| Inlet Outside Diameter | 3.500 INCHES NOMINAL SINGLE INLET IN |
| Inlet Location | LOCATED 3.206 IN. FROM TOP ON END SECTION OF BODY IN |
| Design Type | DRY |
| Overall Diameter | 9.620 INCHES NOMINAL IN |
| Inlet Projection Length | 3.900 INCHES NOMINAL SINGLE INLET IN |
| Baffle Quantity | 2 |
| Muffler Design | BAFFLE |
| Outlet Outside Diameter | 3.500 INCHES NOMINAL FIRST OUTLET IN |
| Inlet Connection Type | UNTHREADED SINGLE INLET |
| Body Shape | ROUND |
| Surface Treatment | ALUMINUM ALLOY |
| Material | STEEL LOCATION NOT OTHERWISE SPECIFIED |
| Outlet Projection Length | 3.900 INCHES NOMINAL FIRST OUTLET IN |
| Outlet Connection Type | UNTHREADED FIRST OUTLET |
| Outlet Location | LOCATED 3.206 IN. C TO C FROM INLET CONNECTION IN SAME END SECTION OF BODY 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 |
|---|---|
| U44130 | Cummins Filtration Inc. (USA) |
| U44130-S PRIMARY | Cummins Filtration Inc. (USA) |
| Reference | Meaning |
|---|---|
| L1450-1 | 5/9 Secondary reference Pettibone Llc |
| L1450-1 | C/1 Advisory reference — outside the item-of-supply concept Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp. |
| LA1450-1 | C/1 Advisory reference — outside the item-of-supply concept Pettibone Llc |
NSN 2990-01-101-5431 is a Muffler,exhaust, manufactured by Cummins Filtration Inc., classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-01-101-5431 has 2 manufacturer part numbers on file: U44130 (Cummins Filtration Inc.), U44130-S (Cummins Filtration Inc.).
Key specifications for U44130-S: Operating Position: UNIVERSAL; Inlet Outside Diameter: 3.500 INCHES NOMINAL SINGLE INLET IN; Inlet Location: LOCATED 3.206 IN. FROM TOP ON END SECTION OF BODY IN; Design Type: DRY. 16 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.