The Valve,check, cataloged under National Stock Number 4820-01-481-3431, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Parker-Hannifin Corporation Dba Pneutronics Div Pneumatic Division. Government technical data includes 5 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-481-3431 |
| Primary Part Number | 527-8D |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Parker-Hannifin Corporation Dba Pneutronics Div Pneumatic Division |
| Status | ACTIVE |
| Mounting Position | HORIZONTAL |
| Style Designator | STRAIGHT THRU FLANGED ENDS |
| Valve Size | 0.375 INCHES IN |
| Face to Face Distance | 8.000 INCHES IN |
| Material | ALUMINUM ALLOY BODY |
| 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 |
|---|---|
| 527-8D PRIMARY | Parker-Hannifin Corporation Dba Pneutronics Div Pneumatic Division (USA) |
| 28001-208-3 | Scott Industrial Systems, Inc (USA) |
| Reference | Meaning |
|---|---|
| 28001-208-3 | 5/9 Secondary reference Vonberg Valve, Inc. |
NSN 4820-01-481-3431 is a Valve,check, manufactured by Parker-Hannifin Corporation Dba Pneutronics Div Pneumatic Division, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-481-3431 has 2 manufacturer part numbers on file: 527-8D (Parker-Hannifin Corporation Dba Pneutronics Div Pneumatic Division), 28001-208-3 (Scott Industrial Systems, Inc).
Key specifications for 527-8D: Mounting Position: HORIZONTAL; Style Designator: STRAIGHT THRU FLANGED ENDS; Valve Size: 0.375 INCHES IN; Face to Face Distance: 8.000 INCHES IN. 5 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.