The Valve,check, cataloged under National Stock Number 4820-00-435-5659, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Goodrich Corporation Dba Goodrich Corp, a New York Corp. Government technical data includes 18 specifications, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-435-5659 |
| Primary Part Number | 5731A2 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Goodrich Corporation Dba Goodrich Corp, a New York Corp |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Connection Style | SOCKET (TUBE) SECOND END |
| Connection Style | FLARED (TUBE) FIRST END |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Connection Type | THREADED EXTERNAL TUBE FIRST END |
| Connection Type | UNTHREADED INTERNAL TUBE SECOND END |
| Style Designator | STRAIGHT THRU |
| Nominal Outside Diameter Tube Accommodated | 0.250 INCHES SECOND END IN |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 0.438 INCHES FIRST END IN |
| Seat Angle | 37.0 DEGREES FIRST END |
| Disk Loading Method | SPRING |
| Thread Class | 2A FIRST END A |
| Material | COPPER ALLOY BODY |
| Material | STEEL CORROSION RESISTING FLOW CONTROL DEVICE |
| Material | COPPER ALLOY SEAT |
| Thread Series Designator | UNF FIRST END |
| 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 |
|---|---|
| 5731A2 PRIMARY | Goodrich Corporation Dba Goodrich Corp, a New York Corp (USA) |
| Reference | Meaning |
|---|---|
| 5731A2 | 5/9 Secondary reference Scovill Inc Schrader Bellows Div |
NSN 4820-00-435-5659 is a Valve,check, manufactured by Goodrich Corporation Dba Goodrich Corp, a New York Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-435-5659 has 1 manufacturer part number on file: 5731A2 (Goodrich Corporation Dba Goodrich Corp, a New York Corp).
Key specifications for 5731A2: Flow Control Device: POPPET; Connection Style: SOCKET (TUBE) SECOND END; Connection Style: FLARED (TUBE) FIRST END; Mounting Position: HORIZONTAL OR VERTICAL. 18 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.