The Seat,valve, cataloged under National Stock Number 4820-00-104-7055, 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10 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-104-7055 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.748 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN |
| Flange Diameter | 3.375 INCHES NOMINAL IN |
| Body Outside Diameter | 1.872 INCHES MINIMUM AND 1.873 INCHES MAXIMUM IN |
| Style Designator | PLAIN FLANGED |
| Material Document and Classification | MIL-N-6710,COND E,FINISH 4 MIL SPEC SINGLE MATERIAL RESPONSE BODY |
| Body Inside Diameter | 1.238 INCHES MINIMUM AND 1.244 INCHES MAXIMUM IN |
| Seat Radius | 0.288 INCHES MINIMUM AND 0.294 INCHES MAXIMUM IN |
| Under Flange Height | 0.867 INCHES NOMINAL IN |
| Material | NICKEL ALLOY BODY |
| Seating Surface Shape | RADIAL |
| 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 |
|---|---|
| 101B209DAPC1 | 3/2 Design control — primary reference U.S. Government activity |
| B708D04B | 5/9 Secondary reference General Electric Co Naval and Drive Turbine Systems Dept |
| PL501E458BCPC13 | 5/2 Secondary reference U.S. Government activity |
NSN 4820-00-104-7055 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-00-104-7055: Flange Seat to Disk End Height: 0.748 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN; Flange Diameter: 3.375 INCHES NOMINAL IN; Body Outside Diameter: 1.872 INCHES MINIMUM AND 1.873 INCHES MAXIMUM IN; Style Designator: PLAIN FLANGED. 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.