The Seat,valve, cataloged under National Stock Number 4820-01-105-4048, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 10 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-105-4048 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flange Diameter | 0.500 INCHES NOMINAL IN |
| Body Outside Diameter | 0.313 INCHES NOMINAL IN |
| Thread Length | 0.171 INCHES NOMINAL SINGLE THREADED PORTION IN |
| Hardness Rating | 43.0 ROCKWELL C MINIMUM AND 49.0 ROCKWELL C MAXIMUM OVERALL |
| Body Inside Diameter | 0.188 INCHES NOMINAL IN |
| Nominal Thread Size | 0.375 INCHES SINGLE THREADED PORTION IN |
| Thread Class | 2A SINGLE THREADED PORTION A |
| 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 |
|---|---|
| 307163 | 3/9 Design control — primary reference Bosch Automation Technology |
NSN 4820-01-105-4048 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-105-4048: Flange Diameter: 0.500 INCHES NOMINAL IN; Overall Height: 0.750 INCHES NOMINAL IN; Body Outside Diameter: 0.313 INCHES NOMINAL IN; Thread Length: 0.171 INCHES NOMINAL SINGLE THREADED PORTION IN. 10 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.