The Muffler,exhaust, cataloged under National Stock Number 2990-00-461-4540, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Lister Petter Ltd. Government technical data includes 14 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-00-461-4540 |
| Primary Part Number | AAF26 |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Lister Petter Ltd |
| Status | ACTIVE |
| Inlet Flange Shape | OVAL SINGLE INLET |
| Operating Position | UNIVERSAL |
| Inlet Location | LOCATED ON END OF BODY |
| Coolant Type | AIR |
| Design Type | DRY |
| Overall Diameter | 4.000 INCHES NOMINAL IN |
| Center to Center Distance Between Mounting Holes | 1-1/8 IN.C TO C OF MTG HOLES SINGLE INLET IN |
| Inlet Connection Type | FLANGE SINGLE INLET |
| Body Shape | ROUND |
| Nonconnection Outlet Location | LOCATED IN END SECTION OF BODY |
| Inlet Flange Mounting Provision and Quantity | 2 HOLES SINGLE INLET |
| Nonconnection Outlet Type and Quantity | 24 ROUND HOLE |
| Surface Treatment | PAINT |
| Material | STEEL LOCATION NOT OTHERWISE SPECIFIED |
| 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 |
|---|---|
| AAF26 | Lister Petter Ltd (GBR) |
| Reference | Meaning |
|---|---|
| AAF26 | 3/9 Design control — primary reference Bendix Automotive of Canada Ltd |
| AAF26 | C/1 Advisory reference — outside the item-of-supply concept Ameritac, Inc. Div Concord Office |
NSN 2990-00-461-4540 is a Muffler,exhaust, manufactured by Lister Petter Ltd, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-00-461-4540 has 1 manufacturer part number on file: AAF26 (Lister Petter Ltd).
Key specifications for AAF26: Inlet Flange Shape: OVAL SINGLE INLET; Operating Position: UNIVERSAL; Inlet Location: LOCATED ON END OF BODY; Coolant Type: AIR. 14 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.