The Valve,check, cataloged under National Stock Number 4820-00-735-6792, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 24 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-735-6792 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Connection Style | PLAIN, OPTIONAL END (PIPE) SECOND END |
| Connection Style | PLAIN (PIPE) FIRST END |
| Mounting Position | VERTICAL |
| Connection Type | THREADED INTERNAL PIPE SECOND END |
| Connection Type | THREADED EXTERNAL PIPE FIRST END |
| Style Designator | STRAIGHT THRU |
| Material Document and Classification | FED STD 66,AISI 303/SAE 30303 FED STD SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | FED STD 66,AISI 304/SAE 30304 FED STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.375 INCHES ALL ENDS IN |
| Maximum Operating Temp | 300.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Disk Loading Method | SPRING |
| Surface Treatment | PASSIVATE |
| Media for Which Designed | AIR SECOND RESPONSE |
| Media for Which Designed | OIL, HYDRAULIC FIRST RESPONSE |
| Media for Which Designed | WATER, FRESH THIRD RESPONSE |
| Material | STEEL COMP 304 FLOW CONTROL DEVICE |
| Material | STEEL COMP 303 BODY |
| Material | RUBBER SYNTHETIC SEAT |
| Thread Series Designator | NPT ALL ENDS |
| Opening Pressure Setting | 1.0 POUNDS PER SQUARE INCH LBS |
| 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 |
|---|---|
| 481 3-8SS1 | 5/9 Secondary reference U.S. Government activity |
| 481-3-8-SS1-2 | 5/9 Secondary reference U.S. Government activity |
| 108D-1 | 3/2 Design control — primary reference U.S. Government activity |
| 481-3-8SS1 | 5/9 Secondary reference U.S. Government activity |
| 1656260PC2 | 5/9 Secondary reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
NSN 4820-00-735-6792 is a Valve,check, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-00-735-6792: Flow Control Device: POPPET; Connection Style: PLAIN, OPTIONAL END (PIPE) SECOND END; Connection Style: PLAIN (PIPE) FIRST END; Mounting Position: VERTICAL. 24 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.