The Muffler,exhaust, cataloged under National Stock Number 2990-01-435-4611, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Eagle Industrial Truck Manufacturing, L.l.c. Div Eagle Industrial Truck Mfg Llc Dba Eagle Tugs. Government technical data includes 12 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-01-435-4611 |
| Primary Part Number | A-TT4-00258-1 |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Eagle Industrial Truck Manufacturing, L.l.c. Div Eagle Industrial Truck Mfg Llc Dba Eagle Tugs |
| Status | ACTIVE |
| Inlet Flange Shape | ROUND SINGLE INLET |
| Operating Position | VERTICAL |
| Coolant Type | AIR |
| Design Type | DRY |
| Inlet Projection Length | 2.000 INCHES NOMINAL SINGLE INLET IN |
| Baffle Quantity | 2 |
| Inlet Flange Mounting Hole Diameter | 2.000 INCHES NOMINAL SINGLE INLET IN |
| Muffler Design | MULTIPASS W/INTEGRAL SPARK ARRESTOR |
| Inlet Connection Type | UNTHREADED SINGLE INLET |
| Body Shape | RECTANGULAR |
| Surface Treatment | CHROMATE ZINC |
| 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 |
|---|---|
| A-TT4-00258-1 PRIMARY | Eagle Industrial Truck Manufacturing, L.l.c. Div Eagle Industrial Truck Mfg Llc Dba Eagle Tugs (USA) |
| Reference | Meaning |
|---|---|
| 2037 | 5/9 Secondary reference Compo Corp an Independently Owned and Operated Business |
| 2037 | 5/9 Secondary reference Dm Manufacturing, Inc. |
NSN 2990-01-435-4611 is a Muffler,exhaust, manufactured by Eagle Industrial Truck Manufacturing, L.l.c. Div Eagle Industrial Truck Mfg Llc Dba Eagle Tugs, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-01-435-4611 has 1 manufacturer part number on file: A-TT4-00258-1 (Eagle Industrial Truck Manufacturing, L.l.c. Div Eagle Industrial Truck Mfg Llc Dba Eagle Tugs).
1 possible match (shared part number, not a government interchangeability claim): 2990-01-529-8300. Verify interchangeability with system specifications before substitution.
Key specifications for A-TT4-00258-1: Inlet Flange Shape: ROUND SINGLE INLET; Operating Position: VERTICAL; Coolant Type: AIR; Design Type: DRY. 12 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.