The Rotor,engine Poppet Valve, cataloged under National Stock Number 2805-00-233-7990, is classified within Federal Supply Class 2805 (Gasoline Reciprocating Engines, Except Aircraft; and Components) of the Engines, Turbines, and Components group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 2805-00-233-7990 |
| Item Name | Rotor,engine Poppet Valve |
| FSC / FSG | 2805 / 28 — Gasoline Reciprocating Engines, Except Aircraft; and Components |
| Status | ACTIVE |
| First Step Diameter | 0.875 INCHES NOMINAL IN |
| Second Step Length | 0.250 INCHES NOMINAL IN |
| Style Designator | POSITIVE TYPE-STRAIGHT BORE |
| Rotation Direction | CLOCKWISE OR COUNTERCLOCKWISE |
| Distance From End to Nearest Step | 0.094 INCHES NOMINAL IN |
| Second Step Diameter | 1.625 INCHES NOMINAL IN |
| First Step Length | 0.156 INCHES NOMINAL IN |
| Spring and Ball Retainer Inside Diameter | 0.750 INCHES NOMINAL IN |
| Bore Diameter | 0.703 INCHES NOMINAL IN |
| 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 |
|---|---|
| 443128C1 | 5/9 Secondary reference Navistar International Corporation Dba Navistar |
| 72593 | 5/9 Secondary reference U.S. Government activity |
| 874934R91 | 5/9 Secondary reference U.S. Government activity |
| 368226C1 | 3/2 Design control — primary reference U.S. Government activity |
| 368226C1 | 5/9 Secondary reference Navistar International Corporation Dba Navistar |
| 443128C1 | 5/9 Secondary reference U.S. Government activity |
NSN 2805-00-233-7990 is a Rotor,engine Poppet Valve, classified under FSC 2805, Gasoline Reciprocating Engines, Except Aircraft; and Components. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4820-01-220-5662. Verify interchangeability with system specifications before substitution.
Key specifications for 2805-00-233-7990: Overall Height: 0.531 INCHES NOMINAL IN; First Step Diameter: 0.875 INCHES NOMINAL IN; Second Step Length: 0.250 INCHES NOMINAL IN; Style Designator: POSITIVE TYPE-STRAIGHT BORE. 9 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.