The Valve,check, cataloged under National Stock Number 4820-00-013-1292, 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 17 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-013-1292 |
| Primary Part Number | A02PS303-1 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | The Boeing Company |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Connection Style | FLARED (TUBE) ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Nominal Outside Diameter Tube Accommodated | 0.500 INCHES ALL ENDS IN |
| Operating Pressure | 500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.750 INCHES ALL ENDS IN |
| Seat Angle | 37.0 DEGREES ALL ENDS |
| Disk Loading Method | SPRING |
| Surface Treatment | ANODIZE |
| Thread Class | 3A ALL ENDS A |
| Thread Quantity Per Inch | 16 ALL ENDS |
| Material | STEEL CORROSION RESISTING FLOW CONTROL DEVICE |
| Material | ALUMINUM ALLOY SEAT |
| Material | ALUMINUM ALLOY BODY |
| Thread Series Designator | UNF ALL ENDS |
| 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 |
|---|---|
| A02PS303-1 | The Boeing Company (USA) |
| Reference | Meaning |
|---|---|
| A02PS303-1 | 5/2 Secondary reference U.S. Government activity |
| 20B21 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-00-013-1292 is a Valve,check, manufactured by The Boeing Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-013-1292 has 1 manufacturer part number on file: A02PS303-1 (The Boeing Company).
Key specifications for A02PS303-1: Flow Control Device: DISK; Connection Style: FLARED (TUBE) ALL ENDS; Style Designator: STRAIGHT THRU; Nominal Outside Diameter Tube Accommodated: 0.500 INCHES ALL ENDS IN. 17 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.