The Pipe,exhaust, cataloged under National Stock Number 2990-01-173-4266, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Walker Mfg Co. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-01-173-4266 |
| Primary Part Number | 49012 |
| Item Name | Pipe,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Walker Mfg Co |
| 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 |
|---|---|
| 49165 | Walker Mfg Co (USA) |
| 49012 PRIMARY | Walker Mfg Co (USA) |
| Reference | Meaning |
|---|---|
| 758971C1 | 5/9 Secondary reference U.S. Government activity |
| 511343C1 | 5/2 Secondary reference U.S. Government activity |
| 758539C1 | 5/9 Secondary reference U.S. Government activity |
| 360489C1 | 5/9 Secondary reference Navistar International Corporation Dba Navistar |
NSN 2990-01-173-4266 is a Pipe,exhaust, manufactured by Walker Mfg Co, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-01-173-4266 has 2 manufacturer part numbers on file: 49165 (Walker Mfg Co), 49012 (Walker Mfg Co).
2 possible matches (shared part number, not a government interchangeability claim): 5950-01-213-8287, 5120-01-610-9638. Verify interchangeability with system specifications before substitution.
Key specifications for 49012: Special Features: ROUND SHAPE;4.000 IN. OD;48.000 IN. LG;USED WITH 170 IN. WHEEL BASE IN; End Item Identification: TRUCK; NAVISTAR INTERNATIONAL CORP; MODEL 1724. 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.