The Disk,valve, cataloged under National Stock Number 4820-01-328-3123, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 4 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-328-3123 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Shank Diameter | 2.625 INCHES NOMINAL IN |
| Outside Diameter | 7.031 INCHES NOMINAL IN |
| Style Designator | SWING CHECK |
| 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 |
|---|---|
| 501-4450086 | D/9 Drawing number reference only U.S. Government activity |
| 501-4450086 PIECES 1-4-5-19 | 3/2 Design control — primary reference U.S. Government activity |
| 501-4450086 PIE | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 4820-01-328-3123 is a Disk,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-328-3123: Shank Diameter: 2.625 INCHES NOMINAL IN; Outside Diameter: 7.031 INCHES NOMINAL IN; Style Designator: SWING CHECK; Special Features: INCL DISK 1,GASKET 1,CLAMP RING 1,SCREW 19. 4 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.