The Hanger,engine Exhaust System, cataloged under National Stock Number 2990-01-178-3029, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Maremont Corp. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 2990-01-178-3029 |
| Primary Part Number | TH903 |
| Item Name | Hanger,engine Exhaust System |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Maremont Corp |
| Status | ACTIVE |
| 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 |
|---|---|
| TH903 PRIMARY | Maremont Corp (USA) |
| 35459 PRIMARY | Rockford Powertrain Inc Div Powertrain Rockford, Inc. (USA) |
| 35459 PRIMARY | Walker Mfg Co (USA) |
| Reference | Meaning |
|---|---|
| 4167426 | 3/2 Design control — primary reference U.S. Government activity |
| 3638334 | 5/9 Secondary reference Chrysler Corp Hamtramck Assembly |
NSN 2990-01-178-3029 is a Hanger,engine Exhaust System, manufactured by Maremont Corp, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-01-178-3029 has 3 manufacturer part numbers on file: TH903 (Maremont Corp), 35459 (Rockford Powertrain Inc Div Powertrain Rockford, Inc.), 35459 (Walker Mfg Co).
Key specifications for TH903: End Item Identification: 1978-81 DODGE LIGHT DUTY TRUCK. 0 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.