The Retainer,disk,valve, cataloged under National Stock Number 4820-01-340-6544, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-340-6544 |
| Item Name | Retainer,disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Valve Model Number for Which Designed | FSC APPLICATION DATA:VALVE ASSEMBLY SEQUENCE LANDING GEAR |
| 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 |
|---|---|
| 43382 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-340-6544 is a Retainer,disk,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4730-01-341-5247. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-340-6544: Valve Model Number for Which Designed: FSC APPLICATION DATA:VALVE ASSEMBLY SEQUENCE LANDING GEAR; Special Features: ALUMINUM ALLOY,QQ-A-225/6,ALLOY 2024,T851; FINISH: ANODIZE PER MIL-A-8625,TYPE II; 0.500 IN. OUTSIDE DIA ONE END; OTHER END 0.6875 IN. APPROX OUTSIDE DIA W/1 HEX SHAPE HOLE THRU 0.250 IN. MIN TO 0.253 IN. MAX CENTERED; 0.438 IN. LGTH; THREAD DATA: 3/4-16 UNF-3A; USED ON P/N 70253-10,CAGEC 99643 A; End Item Identification: ACFT,TYPE B-2. 1 specification is 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 4820-01-340-6544 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.