The Valve,check, cataloged under National Stock Number 4820-01-342-4003, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Woodward, Inc. Div Fuel Systems and Controls. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-342-4003 |
| Primary Part Number | 5225-494 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Woodward, Inc. Div Fuel Systems and Controls |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Mounting Position | HORIZONTAL |
| Connection Type | UNTHREADED CARTRIDGE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Nominal Outside Diameter | 0.500 INCHES ALL ENDS IN |
| Material | STEEL CORROSION RESISTING BODY |
| Valve Operation Method | AUTOMATIC |
| 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 |
|---|---|
| 5225-494 PRIMARY | Woodward, Inc. Div Fuel Systems and Controls (USA) |
| 5225-494 PRIMARY | Woodward Governor Company Dba Aircraft Product Service Center Div Aircraft Products Center (USA) |
| Reference | Meaning |
|---|---|
| 5225-494 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-342-4003 is a Valve,check, manufactured by Woodward, Inc. Div Fuel Systems and Controls, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-342-4003 has 2 manufacturer part numbers on file: 5225-494 (Woodward, Inc. Div Fuel Systems and Controls), 5225-494 (Woodward Governor Company Dba Aircraft Product Service Center Div Aircraft Products Center).
Key specifications for 5225-494: Flow Control Device: DISK; Mounting Position: HORIZONTAL; Connection Type: UNTHREADED CARTRIDGE ALL ENDS; Style Designator: STRAIGHT THRU. 7 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.
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.