The Disk,valve, cataloged under National Stock Number 4820-01-202-7938, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Parker-Hannifin Corporation Dba Pneutronics. Government technical data includes 10 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-202-7938 |
| Primary Part Number | 2499587 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Parker-Hannifin Corporation Dba Pneutronics |
| Status | ACTIVE |
| Shank Diameter | 0.083 INCHES NOMINAL IN |
| Flange Seat to Disk End Height | 0.465 INCHES NOMINAL IN |
| FSC Application Data | MISCELLANEOUS ENGINE ACCESSORIES,AIRCRAFT |
| Pressure Rating | 197.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS |
| Style Designator | POPPET |
| Tip Diameter | 0.187 INCHES NOMINAL IN |
| Seat Angle | 30.0 DEGREES NOMINAL |
| Under Flange Height | 0.245 INCHES NOMINAL IN |
| Media for Which Designed | AIR |
| Material | STEEL |
| 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 |
|---|---|
| 2499587 PRIMARY | Parker-Hannifin Corporation Dba Pneutronics (USA) |
| Reference | Meaning |
|---|---|
| 2499587 | 5/9 Secondary reference U.S. Government activity |
| 2499587 | 5/9 Secondary reference U.S. Government activity |
| 2499587 | 5/1 Secondary reference Parker-Hannifin Corporation Dba Service and Support Operation Div Services and Support Operations |
NSN 4820-01-202-7938 is a Disk,valve, manufactured by Parker-Hannifin Corporation Dba Pneutronics, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-202-7938 has 1 manufacturer part number on file: 2499587 (Parker-Hannifin Corporation Dba Pneutronics).
Key specifications for 2499587: Shank Diameter: 0.083 INCHES NOMINAL IN; Flange Seat to Disk End Height: 0.465 INCHES NOMINAL IN; Overall Height: 0.802 INCHES NOMINAL IN; FSC Application Data: MISCELLANEOUS ENGINE ACCESSORIES,AIRCRAFT. 10 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.