The Valve,expansion, cataloged under National Stock Number 4820-01-481-3679, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is The Boeing Company. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-481-3679 |
| Primary Part Number | 7-511A21523-3 |
| Item Name | Valve,expansion |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | The Boeing Company |
| Status | ACTIVE |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 7-211A21523 | The Boeing Company (USA) |
| 7-511A21523-3 | Triumph Thermal Systems - Maryland, Inc. (USA) |
| 7-511A21523-3 PRIMARY | The Boeing Company (USA) |
NSN 4820-01-481-3679 is a Valve,expansion, manufactured by The Boeing Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-481-3679 has 3 manufacturer part numbers on file: 7-211A21523 (The Boeing Company), 7-511A21523-3 (Triumph Thermal Systems - Maryland, Inc.), 7-511A21523-3 (The Boeing Company).
Key specifications for 7-511A21523-3: Part Name Assigned by Controlling Agency: VALVE-EXPANSION, EFAB; End Item Identification: APACHE AH-64D HELICOPTER. 0 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 4820-01-481-3679 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.