The Disk,valve, cataloged under National Stock Number 4820-01-157-0264, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 6 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-157-0264 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Shoulder Width | 0.240 INCHES NOMINAL IN |
| Shoulder Height | 0.105 INCHES NOMINAL IN |
| Outside Diameter | 0.450 INCHES NOMINAL IN |
| Style Designator | PLUG |
| Seat Radius | 0.328 INCHES NOMINAL IN |
| Material | NICKEL ALLOY |
| 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 |
|---|---|
| 803-4384536 | D/9 Drawing number reference only U.S. Government activity |
| 803-4384536-1XAX-04 | 3/2 Design control — primary reference U.S. Government activity |
| 4820PL1825713 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 4820-01-157-0264 is a Disk,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4820-01-357-8510. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-157-0264: Overall Height: 0.594 INCHES NOMINAL IN; Shoulder Width: 0.240 INCHES NOMINAL IN; Shoulder Height: 0.105 INCHES NOMINAL IN; Outside Diameter: 0.450 INCHES NOMINAL IN. 6 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.