The Valve,poppet,engine, cataloged under National Stock Number 2805-00-351-6683, is classified within Federal Supply Class 2805 (Gasoline Reciprocating Engines, Except Aircraft; and Components) of the Engines, Turbines, and Components group. The manufacturer of record is Dresser Industries Inc Waukesha Engine Div. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 2805-00-351-6683 |
| Primary Part Number | 263441 |
| Item Name | Valve,poppet,engine |
| FSC / FSG | 2805 / 28 — Gasoline Reciprocating Engines, Except Aircraft; and Components |
| Manufacturer | Dresser Industries Inc Waukesha Engine Div |
| Status | ACTIVE |
| Stem Diameter | 0.4375 INCHES NOMINAL IN |
| Head Height | 0.1870 INCHES NOMINAL IN |
| Second Groove Width | 0.0760 INCHES NOMINAL IN |
| Stem Length | 6.2650 INCHES NOMINAL IN |
| Seat Angle in Deg | 45.0 |
| Chamfer Length | 0.0310 INCHES NOMINAL IN |
| Neck Radius | 0.3120 INCHES NOMINAL IN |
| Metallic Hardness Rating and Location | 28.0 ROCKWELL C MINIMUM STEM |
| Metallic Hardness Rating and Location | 37.0 ROCKWELL C MAXIMUM STEM |
| Metallic Hardness Rating and Location | 45.0 ROCKWELL C MINIMUM TIP |
| Outside Diameter | 1.8700 INCHES MINIMUM AND 1.8800 INCHES MAXIMUM IN |
| Distance From First Groove to Stem End | 0.5247 INCHES NOMINAL IN |
| Stem Style | DOUBLE GROOVED |
| First Groove Diameter | 0.3750 INCHES NOMINAL IN |
| Head Style | FLAT |
| Distance From Second Groove to Stem End | 0.6807 INCHES NOMINAL IN |
| Carbon Relief Groove | NOT INCLUDED |
| Chamfer Angle in Deg | 45.0 |
| Second Groove Diameter | 0.3750 INCHES NOMINAL IN |
| First Groove Width | 0.0760 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 |
NSN 2805-00-351-6683 is a Valve,poppet,engine, manufactured by Dresser Industries Inc Waukesha Engine Div, classified under FSC 2805, Gasoline Reciprocating Engines, Except Aircraft; and Components. Status: active.
NSN 2805-00-351-6683 has 2 manufacturer part numbers on file: 15-200 (Dresser Industries Inc Leroi Div), 263441 (Dresser Industries Inc Waukesha Engine Div).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-202-2077. Verify interchangeability with system specifications before substitution.
Key specifications for 263441: Stem Diameter: 0.4375 INCHES NOMINAL IN; Head Height: 0.1870 INCHES NOMINAL IN; Second Groove Width: 0.0760 INCHES NOMINAL IN; Stem Length: 6.2650 INCHES NOMINAL IN. 20 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.