The Piston,valve, cataloged under National Stock Number 4820-01-416-6856, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 5 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-416-6856 |
| Item Name | Piston,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Valve Type for Which Designed | RELIEF |
| Valve Model Number for Which Designed | 1751 |
| Outside Diameter | 0.124 INCHES NOMINAL IN |
| Valve Design Control Activity | 94874 |
| Material | STEEL COMP 416 |
| 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 |
|---|---|
| 1768 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-416-6856 is a Piston,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-416-6856: Valve Type for Which Designed: RELIEF; Valve Model Number for Which Designed: 1751; Outside Diameter: 0.124 INCHES NOMINAL IN; Overall Length: 0.809 INCHES MINIMUM AND 0.817 INCHES MAXIMUM 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.