The Valve,stop-Check, cataloged under National Stock Number 4820-01-397-5780, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Rgi Inc Dba Rgi Inc. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-397-5780 |
| Primary Part Number | VGB00059HK |
| Item Name | Valve,stop-Check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Rgi Inc Dba Rgi Inc |
| Status | ACTIVE |
| Connection Style | FLARED (TUBE) SECOND END |
| Connection Style | EXTERNAL SEAT FOR GASKET SEAL (BOSS) FIRST END |
| Mounting Position | VERTICAL |
| Criticality Code Justification | FEAT |
| Connection Type | THREADED EXTERNAL BOSS FIRST END |
| Connection Type | THREADED EXTERNAL TUBE SECOND END |
| Style Designator | STRAIGHT THRU |
| Operating Pressure | 2640.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Bonnet Type | INSIDE SCREW |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.437 INCHES FIRST END IN |
| Nominal Thread Size | 0.500 INCHES SECOND END IN |
| Seat Angle | 37.0 DEGREES ALL ENDS |
| Maximum Operating Temp | 125.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Bonnet Attachment Method | THREADED |
| Media for Which Designed | OXYGEN, GASEOUS SINGLE RESPONSE |
| Thread Class | 3A ALL ENDS A |
| Material | COPPER ALLOY BODY |
| Thread Series Designator | UNF ALL ENDS |
| Valve Operation Method | MANUAL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 1828AS179-1 | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| VGB00059HK PRIMARY | Rgi Inc Dba Rgi Inc (USA) |
| Reference | Meaning |
|---|---|
| 232694 | 3/2 Design control — primary reference U.S. Government activity |
| 1828AS179 | 7/2 Vendor item drawing reference Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| VGB00059 | 5/9 Secondary reference Rgi Inc Dba Rgi Inc |
NSN 4820-01-397-5780 is a Valve,stop-Check, manufactured by Rgi Inc Dba Rgi Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-397-5780 has 2 manufacturer part numbers on file: 1828AS179-1 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), VGB00059HK (Rgi Inc Dba Rgi Inc).
Key specifications for VGB00059HK: Connection Style: FLARED (TUBE) SECOND END; Connection Style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) FIRST END; Mounting Position: VERTICAL; Criticality Code Justification: FEAT. 20 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.