The Disk,valve, cataloged under National Stock Number 4820-01-451-0724, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Sea Systems Command. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-451-0724 |
| Primary Part Number | 803-6397434-X44XXX-016 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Shank Diameter | 0.494 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN |
| Flange Seat to Disk End Height | 0.656 INCHES NOMINAL IN |
| Outside Diameter | 1.313 INCHES NOMINAL IN |
| Style Designator | POPPET |
| Seat Angle | 45.0 DEGREES NOMINAL |
| Inside Diameter | 0.312 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING |
| 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 |
|---|---|
| 803-6397434-X44XXX-016 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6397434 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4820-01-451-0724 is a Disk,valve, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-451-0724 has 1 manufacturer part number on file: 803-6397434-X44XXX-016 (Naval Sea Systems Command).
Key specifications for 803-6397434-X44XXX-016: Shank Diameter: 0.494 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN; Flange Seat to Disk End Height: 0.656 INCHES NOMINAL IN; Overall Height: 1.156 INCHES NOMINAL IN; Outside Diameter: 1.313 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.