The Valve,poppet,engine, cataloged under National Stock Number 2815-00-781-5259, is classified within Federal Supply Class 2815 (Diesel Engines and Components) of the Engines, Turbines, and Components group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 2815-00-781-5259 |
| Item Name | Valve,poppet,engine |
| FSC / FSG | 2815 / 28 — Diesel Engines and Components |
| Status | ACTIVE |
| Stem Diameter | 0.3093 INCHES MINIMUM AND 0.3152 INCHES MAXIMUM IN |
| Head Height | 0.1000 INCHES MINIMUM AND 0.1350 INCHES MAXIMUM IN |
| Stem Length | 4.5430 INCHES MINIMUM AND 4.5880 INCHES MAXIMUM IN |
| Seat Angle in Deg | 45.0 |
| Chamfer Length | 0.0200 INCHES MINIMUM AND 0.0300 INCHES MAXIMUM IN |
| Neck Radius | 0.3750 INCHES NOMINAL IN |
| Groove Diameter | 0.2480 INCHES MINIMUM AND 0.2500 INCHES MAXIMUM IN |
| Metallic Hardness Rating and Location | 42.0 ROCKWELL C NOMINAL TIP |
| Distance From Groove to Stem End | 0.2187 INCHES MINIMUM AND 0.2237 INCHES MAXIMUM IN |
| Outside Diameter | 1.1532 INCHES MINIMUM AND 1.1592 INCHES MAXIMUM IN |
| Stem Style | GROOVED |
| Head Style | FLAT |
| Carbon Relief Groove | INCLUDED |
| Chamfer Angle in Deg | 45.0 |
| Groove Width | 0.1094 INCHES MINIMUM AND 0.1144 INCHES MAXIMUM 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 |
|---|---|
| 08200-4001 | 3/9 Design control — primary reference U.S. Government activity |
NSN 2815-00-781-5259 is a Valve,poppet,engine, classified under FSC 2815, Diesel Engines and Components. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 6150-01-042-6428. Verify interchangeability with system specifications before substitution.
Key specifications for 2815-00-781-5259: Stem Diameter: 0.3093 INCHES MINIMUM AND 0.3152 INCHES MAXIMUM IN; Head Height: 0.1000 INCHES MINIMUM AND 0.1350 INCHES MAXIMUM IN; Stem Length: 4.5430 INCHES MINIMUM AND 4.5880 INCHES MAXIMUM IN; Seat Angle in Deg: 45.0. 15 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.