The Valve,check, cataloged under National Stock Number 4820-00-529-4384, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division. Government technical data includes 14 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-529-4384 |
| Primary Part Number | 483-1B1-2 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Nominal Pipe Size Accommodated | 1.000 INCHES FIRST END IN |
| Connection Style | PLAIN, OPTIONAL END (PIPE) FIRST END |
| Connection Type | THREADED INTERNAL PIPE FIRST END |
| Material Document and Classification | 66 FED STD SINGLE MATERIAL RESPONSE AND AISI 303/SAE 30303 ASSN STD SINGLE MATERIAL RESPONSE AND AISI 304/SAE 30304 ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 1.000 INCHES FIRST END IN |
| Maximum Operating Temp | 180.0 FAHRENHEIT SECOND RESPONSE DEGF |
| Maximum Operating Temp | 20.0 FAHRENHEIT FIRST RESPONSE DEGF |
| Thread Quantity Per Inch | 11-1/2 FIRST END |
| Material | COPPER ALLOY BODY |
| Material | STEEL FLOW CONTROL DEVICE |
| Material | RUBBER SYNTHETIC SEAT |
| Thread Series Designator | NPT FIRST END |
| 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 |
|---|---|
| 483-1B1-2 PRIMARY | Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division (USA) |
| Reference | Meaning |
|---|---|
| 483-1B1-2 | 5/9 Secondary reference U.S. Government activity |
| 483-1-B-1-2 | C/1 Advisory reference — outside the item-of-supply concept Curtiss-Wright Flow Control Corporation Dba Farris Engineering Div Curtiss-Wright Valves Division- Farris |
NSN 4820-00-529-4384 is a Valve,check, manufactured by Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-529-4384 has 1 manufacturer part number on file: 483-1B1-2 (Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division).
Key specifications for 483-1B1-2: Flow Control Device: POPPET; Nominal Pipe Size Accommodated: 1.000 INCHES FIRST END IN; Connection Style: PLAIN, OPTIONAL END (PIPE) FIRST END; Connection Type: THREADED INTERNAL PIPE FIRST END. 14 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.