The Guide,valve Stem, cataloged under National Stock Number 4820-01-423-1959, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 6 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-423-1959 |
| Item Name | Guide,valve Stem |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Taper Minor Diameter | 0.302 INCHES NOMINAL IN |
| Style Designator | PLAIN-TAPERED SHANK END |
| Outside Diameter | 0.553 INCHES NOMINAL IN |
| Taper Length | 0.250 INCHES NOMINAL IN |
| Bore Diameter | 0.2500 INCHES NOMINAL IN |
| 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 |
| Reference | Meaning |
|---|---|
| PLC-11440 | D/9 Drawing number reference only U.S. Government activity |
| 114391CD | 3/2 Design control — primary reference U.S. Government activity |
| PLC-11440-4/.250IPS | 5/2 Secondary reference U.S. Government activity |
NSN 4820-01-423-1959 is a Guide,valve Stem, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-423-1959: Taper Minor Diameter: 0.302 INCHES NOMINAL IN; Style Designator: PLAIN-TAPERED SHANK END; Overall Length: 1.187 INCHES NOMINAL IN; Outside Diameter: 0.553 INCHES NOMINAL IN. 6 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.