The Seat,valve, cataloged under National Stock Number 4820-01-164-7059, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-164-7059 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Thread Length | 0.351 INCHES NOMINAL FIRST THREADED PORTION IN |
| Thread Length | 2.125 INCHES NOMINAL SECOND THREADED PORTION IN |
| Style Designator | DOUBLE FLANGED |
| Body Inside Diameter | 0.500 INCHES NOMINAL IN |
| Nominal Thread Size | 1.000 INCHES FIRST THREADED PORTION IN |
| Nominal Thread Size | 1.750 INCHES SECOND THREADED PORTION IN |
| Thread Class | 2A SECOND THREADED PORTION A |
| Thread Class | 2A FIRST THREADED PORTION A |
| Thread Quantity Per Inch | 12 SECOND THREADED PORTION |
| Thread Quantity Per Inch | 14 FIRST THREADED PORTION |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UN SECOND THREADED PORTION |
| Thread Series Designator | UNS FIRST 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 |
|---|---|
| 072956CD | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-164-7059 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-164-7059: Overall Height: 3.315 INCHES NOMINAL IN; Thread Length: 0.351 INCHES NOMINAL FIRST THREADED PORTION IN; Thread Length: 2.125 INCHES NOMINAL SECOND THREADED PORTION IN; Style Designator: DOUBLE FLANGED. 14 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.