The Valve,check, cataloged under National Stock Number 4820-01-288-5777, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Bonney Forge Valve. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-288-5777 |
| Primary Part Number | H-61-T 1/2 IN |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Bonney Forge Valve |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Furnished Items and Quantity | 2 BOLT |
| Connection Style | PLAIN, OPTIONAL END (PIPE) ALL ENDS |
| Mounting Position | HORIZONTAL |
| Connection Type | THREADED INTERNAL PIPE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Material Document and Classification | ASTM A105 ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Operating Pressure | 1975.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.500 INCHES ALL ENDS IN |
| Maximum Operating Temp | 100.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Disk Loading Method | SPRING |
| Media for Which Designed | WATER-OIL-GAS SINGLE RESPONSE |
| Material | STEEL UNS K03504 BODY |
| Material | STEEL COMP 410 SEAT |
| Thread Series Designator | NPT 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 |
|---|---|
| H-61-T 1/2 IN PRIMARY | Bonney Forge Valve (USA) |
NSN 4820-01-288-5777 is a Valve,check, manufactured by Bonney Forge Valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-288-5777 has 1 manufacturer part number on file: H-61-T 1/2 IN (Bonney Forge Valve).
Key specifications for H-61-T 1/2 IN: Flow Control Device: DISK; Furnished Items and Quantity: 2 BOLT; Connection Style: PLAIN, OPTIONAL END (PIPE) ALL ENDS; Mounting Position: HORIZONTAL. 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.