The Disk,valve, cataloged under National Stock Number 4820-01-340-5379, 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6 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-340-5379 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| FSC Application Data | VALVE ASSEMBLY SEQUENCE LANDING GEAR,AIRCRAFT |
| Outside Diameter | 0.549 INCHES MINIMUM AND 0.550 INCHES MAXIMUM IN |
| Supplementary Features | USED ON VALVE ASSY,SEQUENCE LNDG GEAR,P/N 70253-10,CAGEC 99643 |
| Style Designator | SOLID |
| Material Document and Classification | QQ-A-225/6, ALLOY 2024-T851 FED SPEC SINGLE MATERIAL RESPONSE |
| Material | ALUMINUM ALLOY 2024 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 43381 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-340-5379 is a Disk,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4730-01-341-7213. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-340-5379: Overall Height: 0.125 INCHES NOMINAL IN; FSC Application Data: VALVE ASSEMBLY SEQUENCE LANDING GEAR,AIRCRAFT; Outside Diameter: 0.549 INCHES MINIMUM AND 0.550 INCHES MAXIMUM IN; Supplementary Features: USED ON VALVE ASSY,SEQUENCE LNDG GEAR,P/N 70253-10,CAGEC 99643. 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.
NSN 4820-01-340-5379 has DEMIL Code Q. 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.