The Seat,valve, cataloged under National Stock Number 4820-00-627-7486, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-00-627-7486 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.085 INCHES NOMINAL IN |
| Flange Diameter | 0.555 INCHES MINIMUM AND 0.558 INCHES MAXIMUM IN |
| Style Designator | THREADED FLANGED |
| Body Inside Diameter | 0.340 INCHES MINIMUM AND 0.350 INCHES MAXIMUM IN |
| Nominal Thread Size | 0.500 INCHES SINGLE THREADED PORTION IN |
| Surface Treatment | PASSIVATE OVERALL |
| Under Flange Height | 0.535 INCHES MINIMUM AND 0.545 INCHES MAXIMUM IN |
| Thread Class | 3A SINGLE THREADED PORTION A |
| Thread Quantity Per Inch | 20 SINGLE THREADED PORTION |
| Material | STEEL OVERALL |
| Thread Series Designator | UNF SINGLE THREADED PORTION |
| 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 |
|---|---|
| 214424 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-00-627-7486 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 3830-01-105-0164. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-00-627-7486: Flange Seat to Disk End Height: 0.085 INCHES NOMINAL IN; Flange Diameter: 0.555 INCHES MINIMUM AND 0.558 INCHES MAXIMUM IN; Overall Height: 0.620 INCHES MINIMUM AND 0.630 INCHES MAXIMUM IN; Style Designator: THREADED FLANGED. 12 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.