The Seat,valve, cataloged under National Stock Number 4820-00-486-5647, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 11 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-486-5647 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.140 INCHES NOMINAL IN |
| Flange Diameter | 1.743 INCHES MINIMUM AND 1.745 INCHES MAXIMUM IN |
| FSC Application Data | VALVE,GATE,HYDRAULIC SYSTEM,AIRCRAFT |
| Body Outside Diameter | 1.743 INCHES MINIMUM AND 1.745 INCHES MAXIMUM IN |
| Seal Accommodation Type | BEADED |
| Style Designator | PLAIN FLANGED |
| Body Inside Diameter | 1.183 INCHES MINIMUM AND 1.193 INCHES MAXIMUM IN |
| Surface Treatment | ANODIZE OVERALL |
| Under Flange Height | 0.250 INCHES NOMINAL IN |
| Material | ALUMINUM OVERALL |
| Seating Surface Shape | FLAT |
| 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 |
|---|---|
| 321912 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-00-486-5647 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-00-486-5647: Flange Seat to Disk End Height: 0.140 INCHES NOMINAL IN; Flange Diameter: 1.743 INCHES MINIMUM AND 1.745 INCHES MAXIMUM IN; FSC Application Data: VALVE,GATE,HYDRAULIC SYSTEM,AIRCRAFT; Body Outside Diameter: 1.743 INCHES MINIMUM AND 1.745 INCHES MAXIMUM IN. 11 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.