The Valve,check, cataloged under National Stock Number 4820-01-242-9530, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is The Boeing Company. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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.
| Parameter | Value |
|---|---|
| NSN | 4820-01-242-9530 |
| Primary Part Number | A51HS090-1 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | The Boeing Company |
| Status | ACTIVE |
| FSC Application Data | AIRCRAFT MODEL CH-46 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| A51HS090-1 | The Boeing Company (USA) |
| Reference | Meaning |
|---|---|
| 3R1788 | 3/2 Design control — primary reference U.S. Government activity |
| A15HS090-1 | C/1 Advisory reference — outside the item-of-supply concept The Boeing Company |
NSN 4820-01-242-9530 is a Valve,check, manufactured by The Boeing Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-242-9530 has 1 manufacturer part number on file: A51HS090-1 (The Boeing Company).
Key specifications for A51HS090-1: FSC Application Data: AIRCRAFT MODEL CH-46; Special Features: OPERATING PRESSURE 0-100 PSIG; TEMPERATURE RANGE -65 F TO + 275 F; FINISH HARD ANODIZE. 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.
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.