The Flange,exhaust Pipe, cataloged under National Stock Number 2990-00-860-7204, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. Government technical data includes 3 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 2990-00-860-7204 |
| Item Name | Flange,exhaust Pipe |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Status | ACTIVE |
| Mounting Hole Quantity | 3 |
| Flange Length | 8.250 INCHES NOMINAL IN |
| Material | STEEL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 52490 | 3/2 Design control — primary reference U.S. Government activity |
NSN 2990-00-860-7204 is a Flange,exhaust Pipe, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 2040-01-032-9079, 5120-01-335-2270. Verify interchangeability with system specifications before substitution.
Key specifications for 2990-00-860-7204: Mounting Hole Quantity: 3; Flange Length: 8.250 INCHES NOMINAL IN; Special Features: FIRST END THREADED,3.312-8 IN.NPT THD SIZE,SECOND END 3.250 IN. OD TUBE SIZE,WELDED,THREE MTG HOLES 0.312 IN DIA. LOCATED 120 DEGREES APART IN; Material: STEEL. 3 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.