The Disk,valve, cataloged under National Stock Number 4820-01-284-4579, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 8 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-284-4579 |
| Primary Part Number | AU3961.003CP |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Shank Diameter | 0.650 INCHES NOMINAL IN |
| Flange Diameter | 1.183 INCHES NOMINAL IN |
| Pressure Rating | 6000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS |
| Criticality Code Justification | ZZZY |
| Style Designator | POPPET |
| Media for Which Designed | NITROGEN, LIQUID |
| Material | NICKEL ALLOY 400 |
| Reference Number Differentiating Characteristics | CLEANING, PACKAGING, AND MARKING IAW THE LATEST REVISION OF MIL-STD-1330 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| AU3961.003CP | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| A13961.003CP | C/1 Advisory reference — outside the item-of-supply concept Naval Inventory Control Point Mechanicsburg |
| A13961.003 | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| A13961.003 | 3/1 Design control — primary reference Emerson Automation Solutions Final Control Us Lp Div Navy Product Team |
NSN 4820-01-284-4579 is a Disk,valve, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-284-4579 has 1 manufacturer part number on file: AU3961.003CP (Naval Inventory Control Point Mechanicsburg).
Key specifications for AU3961.003CP: Shank Diameter: 0.650 INCHES NOMINAL IN; Flange Diameter: 1.183 INCHES NOMINAL IN; Overall Height: 0.410 INCHES NOMINAL IN; Pressure Rating: 6000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS. 8 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.