The Disk,valve, cataloged under National Stock Number 4820-01-421-9648, 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 4 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-421-9648 |
| Primary Part Number | 803-6397434-X43XXX-048 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Shank Diameter | 0.750 INCHES NOMINAL IN |
| Flange Seat to Disk End Height | 0.812 INCHES NOMINAL IN |
| Outside Diameter | 1.313 INCHES NOMINAL IN |
| Inside Diameter | 0.395 INCHES NOMINAL IN |
| 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-X43XXX ITEM 15 | Naval Sea Systems Command (USA) |
| 803-6397434-X43XXX-048 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6397434 | D/9 Drawing number reference only Naval Sea Systems Command |
| 803-6397434-X43XXX-015 | 5/9 Secondary reference Naval Sea Systems Command |
| 803-6397434-X23 | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
NSN 4820-01-421-9648 is a Disk,valve, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-421-9648 has 2 manufacturer part numbers on file: 803-6397434-X43XXX ITEM 15 (Naval Sea Systems Command), 803-6397434-X43XXX-048 (Naval Sea Systems Command).
Key specifications for 803-6397434-X43XXX-048: Shank Diameter: 0.750 INCHES NOMINAL IN; Flange Seat to Disk End Height: 0.812 INCHES NOMINAL IN; Overall Height: 1.312 INCHES NOMINAL IN; Outside Diameter: 1.313 INCHES NOMINAL IN. 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.