The Valve,butterfly, cataloged under National Stock Number 4820-01-171-0442, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Aerospace Lighting Corporation. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Valve,butterfly |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | The Boeing Company (CAGE 8V613); Aerospace Lighting Corporation (CAGE 59579) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-171-0442 |
| Primary Part Number | 2150 |
| Item Name | Valve,butterfly |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Aerospace Lighting Corporation |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 7-311A21257 | The Boeing Company (USA) |
| 2150 PRIMARY | Aerospace Lighting Corporation (USA) |
| Reference | Meaning |
|---|---|
| 2150 | 5/9 Secondary reference U.S. Government activity |
| 7-311A21257 | 5/9 Secondary reference Mcdonnell Douglas Helicopter Co Inc |
NSN 4820-01-171-0442 is a Valve,butterfly, manufactured by Aerospace Lighting Corporation, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-171-0442 has 2 manufacturer part numbers on file: 7-311A21257 (The Boeing Company), 2150 (Aerospace Lighting Corporation).
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 4820-01-171-0442 has DEMIL Code B. 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.