The Guide,valve Stem, cataloged under National Stock Number 4820-01-459-4459, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Velan Valve Corp.. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-459-4459 |
| Primary Part Number | 78508 PIECE 14 |
| Item Name | Guide,valve Stem |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Velan Valve Corp. |
| Status | ACTIVE |
| Style Designator | PLAIN |
| Material | STEEL CORROSION RESISTING |
| 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 |
|---|---|
| 78508 PIECE 14 PRIMARY | Velan Valve Corp. (USA) |
| Reference | Meaning |
|---|---|
| 78508 | D/9 Drawing number reference only Velan Valve Corp. |
NSN 4820-01-459-4459 is a Guide,valve Stem, manufactured by Velan Valve Corp., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-459-4459 has 1 manufacturer part number on file: 78508 PIECE 14 (Velan Valve Corp.).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-459-4471, 4820-01-459-5269. Verify interchangeability with system specifications before substitution.
Key specifications for 78508 PIECE 14: Style Designator: PLAIN; Special Features: NEXT HIGHER ASSY VALVE,GLB 3.0 CAGE 57574; End Item Identification: NIMITZ CLASS CVN; Material: STEEL CORROSION RESISTING. 2 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.