The Valve,poppet,engine, cataloged under National Stock Number 2805-00-757-4105, 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 General Motors Llc Dba General Motors Llc. Government technical data includes 7 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 2805-00-757-4105 |
| Primary Part Number | 6263778 |
| Item Name | Valve,poppet,engine |
| FSC / FSG | 2805 / 28 — Gasoline Reciprocating Engines, Except Aircraft; and Components |
| Manufacturer | General Motors Llc Dba General Motors Llc |
| Status | ACTIVE |
| Stem Diameter | 0.3410 INCHES NOMINAL IN |
| Stem Length | 4.8437 INCHES NOMINAL IN |
| Seat Angle in Deg | 45.0 |
| Outside Diameter | 1.5000 INCHES NOMINAL IN |
| Stem Style | GROOVED |
| Head Style | MUSHROOM |
| Carbon Relief Groove | NOT INCLUDED |
| 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 |
|---|---|
| 6263778 PRIMARY | General Motors Llc Dba General Motors Llc (USA) |
| 329275 PRIMARY | General Motors Llc Dba General Motors Llc (USA) |
| Reference | Meaning |
|---|---|
| 39275 | 5/9 Secondary reference General Motors Corp Chevrolet Motor Div Special Products Dept |
| 6263778 | C/1 Advisory reference — outside the item-of-supply concept Military Vehicles Opn General Motors Truck and Bus Group Ms 2603-02 |
| S2809 | 3/2 Design control — primary reference U.S. Government activity |
| 6263778 | 5/9 Secondary reference General Motors Corp Chevrolet Motor Div Special Products Dept |
| 254680 | C/1 Advisory reference — outside the item-of-supply concept Hyster-Yale Group, Inc. |
| 329275 | 5/9 Secondary reference General Motors Corp Chevrolet Motor Div Special Products Dept |
NSN 2805-00-757-4105 is a Valve,poppet,engine, manufactured by General Motors Llc Dba General Motors Llc, classified under FSC 2805, Gasoline Reciprocating Engines, Except Aircraft; and Components. Status: active.
NSN 2805-00-757-4105 has 2 manufacturer part numbers on file: 6263778 (General Motors Llc Dba General Motors Llc), 329275 (General Motors Llc Dba General Motors Llc).
3 possible matches (shared part number, not a government interchangeability claim): 5331-01-149-7727, 5310-01-461-6831, 4320-01-532-9852. Verify interchangeability with system specifications before substitution.
Key specifications for 6263778: Stem Diameter: 0.3410 INCHES NOMINAL IN; Stem Length: 4.8437 INCHES NOMINAL IN; Seat Angle in Deg: 45.0; Outside Diameter: 1.5000 INCHES NOMINAL IN. 7 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.