The Seat,valve, cataloged under National Stock Number 4820-01-560-7531, 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 2 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-560-7531 |
| Primary Part Number | 7417583 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Body Outside Diameter | 7.120 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY 6061 BODY |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 7417583 PRIMARY | Naval Sea Systems Command (USA) |
| 7417583 FIND 1 | Naval Sea Systems Command (USA) |
NSN 4820-01-560-7531 is a Seat,valve, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-560-7531 has 2 manufacturer part numbers on file: 7417583 (Naval Sea Systems Command), 7417583 FIND 1 (Naval Sea Systems Command).
Key specifications for 7417583: Overall Height: 1.500 INCHES NOMINAL IN; Body Outside Diameter: 7.120 INCHES NOMINAL IN; Special Features: VALVE SEAT WITH 2 BRONZE BEARINGS; Part Name Assigned by Controlling Agency: VALVE SEAT, MAST HEAD. 2 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.
NSN 4820-01-560-7531 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.