The Disk,valve, cataloged under National Stock Number 4820-00-152-1642, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Curtiss-Wright Electro-Mechanical Corporation Div Epd. Government technical data includes 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-152-1642 |
| Primary Part Number | 1559P |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corporation Div Epd |
| Status | ACTIVE |
| Lower Surface Width | 0.250 INCHES NOMINAL IN |
| Shoulder Width | 1.312 INCHES NOMINAL IN |
| Shoulder Height | 0.250 INCHES NOMINAL IN |
| Outside Diameter | 5.937 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Inside Diameter | 0.812 INCHES NOMINAL IN |
| Material | COPPER ALLOY |
| 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 |
|---|---|
| 1559P PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA) |
| Reference | Meaning |
|---|---|
| 1559P | 3/9 Design control — primary reference U.S. Government activity |
NSN 4820-00-152-1642 is a Disk,valve, manufactured by Curtiss-Wright Electro-Mechanical Corporation Div Epd, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-152-1642 has 1 manufacturer part number on file: 1559P (Curtiss-Wright Electro-Mechanical Corporation Div Epd).
Key specifications for 1559P: Overall Height: 0.828 INCHES NOMINAL IN; Lower Surface Width: 0.250 INCHES NOMINAL IN; Shoulder Width: 1.312 INCHES NOMINAL IN; Shoulder Height: 0.250 INCHES NOMINAL IN. 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.