The Guide,valve Stem, cataloged under National Stock Number 2805-00-428-0251, 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 14 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2805-00-428-0251 |
| Item Name | Guide,valve Stem |
| FSC / FSG | 2805 / 28 — Gasoline Reciprocating Engines, Except Aircraft; and Components |
| Status | ACTIVE |
| FSC Application Data | GASOLINE ENGINE BLOCK |
| Aa End Chamfer Angle in Deg | 45.0 |
| Aa End Chamfer Length | 0.062 INCHES NOMINAL IN |
| Taper Minor Diameter | 0.438 INCHES NOMINAL IN |
| Style Designator | STEPPED-TAPERED SHANK END |
| Bore Counterbore | NOT INCLUDED |
| Outside Diameter | 0.751 INCHES NOMINAL IN |
| Aa End Radius | 0.062 INCHES NOMINAL IN |
| Taper Length | 0.312 INCHES NOMINAL IN |
| Length From Aa End to Largest Diameter Face | 0.875 INCHES NOMINAL IN |
| Aa End Diameter | 0.625 INCHES NOMINAL IN |
| Bore Diameter | 0.3105 INCHES NOMINAL IN |
| Material | IRON CAST |
| Bore Countersink | 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 |
| Reference | Meaning |
|---|---|
| 1CW23 | 5/9 Secondary reference American-Marsh Pumps Inc Novo Pump and Engine Division |
| S15032 | 3/9 Design control — primary reference American-Marsh Pumps Inc Novo Pump and Engine Division |
NSN 2805-00-428-0251 is a Guide,valve Stem, classified under FSC 2805, Gasoline Reciprocating Engines, Except Aircraft; and Components. Status: active.
Key specifications for 2805-00-428-0251: FSC Application Data: GASOLINE ENGINE BLOCK; Aa End Chamfer Angle in Deg: 45.0; Aa End Chamfer Length: 0.062 INCHES NOMINAL IN; Taper Minor Diameter: 0.438 INCHES NOMINAL IN. 14 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.