The Guide,valve Stem, cataloged under National Stock Number 2805-00-386-3439, 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 21 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2805-00-386-3439 |
| Item Name | Guide,valve Stem |
| FSC / FSG | 2805 / 28 — Gasoline Reciprocating Engines, Except Aircraft; and Components |
| Status | ACTIVE |
| Countersink Angle in Deg | 30.0 |
| Width Across Flats | 0.562 INCHES NOMINAL IN |
| Aa End Chamfer Angle in Deg | 15.0 |
| Aa End Chamfer Length | 0.031 INCHES NOMINAL IN |
| Major Diameter Length | 0.094 INCHES NOMINAL IN |
| Bb End Shank Diameter | 0.750 INCHES NOMINAL IN |
| Taper Minor Diameter | 0.625 INCHES NOMINAL IN |
| Bore Counterbore | NOT INCLUDED |
| Outside Diameter | 0.375 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN |
| Countersink Length | 0.016 INCHES NOMINAL IN |
| Flats Length | 0.375 INCHES NOMINAL IN |
| Groove Quantity | 1 |
| Taper Length | 0.375 INCHES NOMINAL IN |
| Length From Aa End to Largest Diameter Face | 2.250 INCHES NOMINAL IN |
| Aa End Diameter | 0.752 INCHES MINIMUM AND 0.753 INCHES MAXIMUM IN |
| Bb End Radius | 0.062 INCHES NOMINAL IN |
| Material | IRON CAST |
| Shoulder First Fillet Radius | 0.375 INCHES NOMINAL IN |
| Metallic Hardness Rating | 18.8 MINIMUM ROCKWELL C |
| Bore Countersink | INCLUDED |
| Countersink Location | AA END |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 3632805-570380 | 3/2 Design control — primary reference U.S. Government activity |
NSN 2805-00-386-3439 is a Guide,valve Stem, classified under FSC 2805, Gasoline Reciprocating Engines, Except Aircraft; and Components. Status: active.
Key specifications for 2805-00-386-3439: Countersink Angle in Deg: 30.0; Width Across Flats: 0.562 INCHES NOMINAL IN; Aa End Chamfer Angle in Deg: 15.0; Aa End Chamfer Length: 0.031 INCHES NOMINAL IN. 21 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.
NSN 2805-00-386-3439 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.