The Seat,valve, cataloged under National Stock Number 4820-00-627-7484, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-627-7484 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.750 INCHES NOMINAL IN |
| Flange Diameter | 0.730 INCHES NOMINAL IN |
| Body Outside Diameter | 0.446 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN |
| Seal Accommodation Type | GROOVED |
| Body Inside Diameter | 0.355 INCHES MINIMUM AND 0.360 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Under Flange Height | 0.162 INCHES NOMINAL IN |
| Material | STEEL 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 |
|---|---|
| 214420 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-00-627-7484 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5940-01-271-1871. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-00-627-7484: Flange Seat to Disk End Height: 0.750 INCHES NOMINAL IN; Flange Diameter: 0.730 INCHES NOMINAL IN; Overall Height: 0.912 INCHES NOMINAL IN; Body Outside Diameter: 0.446 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN. 9 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.