The Valve,check, cataloged under National Stock Number 4820-00-357-5034, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 19 specifications, cited from the U.S. Government catalog. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-357-5034 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Connection Style | DOUBLE THREADED SECTION BOSS FITTING GASKET WITH LOCKNUT SEALING, BOSS SECOND END |
| Connection Style | PLAIN, OPTIONAL END (PIPE) FIRST END |
| Mounting Position | HORIZONTAL |
| Connection Type | THREADED INTERNAL PIPE FIRST END |
| Connection Type | THREADED EXTERNAL BOSS SECOND END |
| Style Designator | STRAIGHT THRU |
| Thread Direction | RIGHT-HAND SECOND END |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 0.437 INCHES SECOND END IN |
| Nominal Thread Size | 0.125 INCHES FIRST END IN |
| Disk Loading Method | SPRING |
| Mounting Facility | BULKHEAD |
| Surface Treatment | PASSIVATE |
| Thread Class | 2A SECOND END A |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | NPT FIRST END |
| Thread Series Designator | UNF SECOND 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 |
| Reference | Meaning |
|---|---|
| 11-97-2902 | 3/2 Design control — primary reference U.S. Government activity |
| 11-79-2902 | 5/2 Secondary reference U.S. Government activity |
| 2640-299ASSY-C | 5/2 Secondary reference U.S. Government activity |
| EBCN11-97-2902 | 5/9 Secondary reference U.S. Government activity |
| 2640-633X1PC19 | 5/9 Secondary reference U.S. Government activity |
| SS-845-2050555ASSY-C | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-00-357-5034 is a Valve,check, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-00-357-5034: Flow Control Device: POPPET; Connection Style: DOUBLE THREADED SECTION BOSS FITTING GASKET WITH LOCKNUT SEALING, BOSS SECOND END; Connection Style: PLAIN, OPTIONAL END (PIPE) FIRST END; Mounting Position: HORIZONTAL. 19 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.