The Disk,valve, cataloged under National Stock Number 4820-00-035-9922, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 7 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-035-9922 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Shank Diameter | 0.497 INCHES NOMINAL IN |
| Flange Seat to Disk End Height | 4.125 INCHES NOMINAL IN |
| Style Designator | POPPET |
| Tip Diameter | 0.497 INCHES NOMINAL IN |
| Seat Angle | 30.0 DEGREES NOMINAL |
| Under Flange Height | 1.605 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| C3731 | 5/9 Secondary reference U.S. Government activity |
| C3731B | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-00-035-9922 is a Disk,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4720-00-484-4268. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-00-035-9922: Shank Diameter: 0.497 INCHES NOMINAL IN; Flange Seat to Disk End Height: 4.125 INCHES NOMINAL IN; Overall Height: 5.945 INCHES NOMINAL IN; Style Designator: POPPET. 7 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.