The Seat,valve, cataloged under National Stock Number 4820-01-004-4561, 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9 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-004-4561 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Thread Length | 0.233 INCHES NOMINAL SINGLE THREADED PORTION IN |
| Seal Accommodation Type | GROOVED |
| Nominal Thread Size | 0.625 INCHES SINGLE THREADED PORTION IN |
| Surface Treatment | ANODIZE OVERALL |
| Thread Class | 3A SINGLE THREADED PORTION A |
| Material | ALUMINUM ALLOY 2024 OVERALL |
| Seat Angle in Deg | 90.000 NOMINAL |
| Thread Series Designator | UNF SINGLE THREADED PORTION |
| Seating Surface Shape | ANGULAR |
| 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 |
|---|---|
| 60005109-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-004-4561 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-004-4561: Thread Length: 0.233 INCHES NOMINAL SINGLE THREADED PORTION IN; Seal Accommodation Type: GROOVED; Nominal Thread Size: 0.625 INCHES SINGLE THREADED PORTION IN; Surface Treatment: ANODIZE OVERALL. 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.