The Valve,check, cataloged under National Stock Number 4820-00-402-2114, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 28 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-402-2114 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flow Control Device | POPPETPOPPET |
| Connection Style | EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND ENDEXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END |
| Connection Style | FLARED (TUBE) FIRST ENDFLARED (TUBE) FIRST END |
| Mounting Position | VERTICALVERTICAL |
| Connection Type | THREADED EXTERNAL TUBE FIRST ENDTHREADED EXTERNAL TUBE FIRST END |
| Connection Type | THREADED EXTERNAL BOSS SECOND ENDTHREADED EXTERNAL BOSS SECOND END |
| Style Designator | STRAIGHT THRU |
| Material Document and Classification | 66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Outside Diameter Tube Accommodated | 0.250 INCHES SECOND END IN |
| Nominal Outside Diameter Tube Accommodated | 0.250 INCHES SECOND END0.250 INCHES FIRST END IN |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Thread Direction | RIGHT-HAND SECOND ENDRIGHT-HAND SECOND END |
| Thread Direction | RIGHT-HAND FIRST ENDRIGHT-HAND FIRST END |
| Nominal Thread Size | 0.438 INCHES SECOND END0.438 INCHES SECOND END IN |
| Nominal Thread Size | 0.437 INCHES FIRST END0.437 INCHES FIRST END IN |
| Seat Angle | 37.0 DEGREES FIRST END |
| Maximum Operating Temp | 500.0 FAHRENHEIT SINGLE RESPONSE500.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Disk Loading Method | SPRINGSPRING |
| Surface Treatment | PASSIVATE |
| Media for Which Designed | WATER, FRESH THIRD RESPONSE |
| Media for Which Designed | STEAM SECOND RESPONSEAIR FIRST RESPONSE |
| Media for Which Designed | WATER, FRESH THIRD RESPONSESTEAM SECOND RESPONSE |
| Thread Class | 3A SECOND END3A SECOND END A |
| Thread Class | 3A FIRST END3A FIRST END A |
| Material | STEEL COMP 303 OVERALL |
| Thread Series Designator | UNF SECOND END |
| Thread Series Designator | UNF SECOND ENDUNF FIRST END |
| Valve Operation Method | AUTOMATICAUTOMATIC |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 580R923H01 | 5/2 Secondary reference U.S. Government activity |
| 262T4DT.2 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-00-402-2114 is a Valve,check, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-00-402-2114: Flow Control Device: POPPETPOPPET; Connection Style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND ENDEXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END; Connection Style: FLARED (TUBE) FIRST ENDFLARED (TUBE) FIRST END; Mounting Position: VERTICALVERTICAL. 28 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.