The Seat,valve, cataloged under National Stock Number 4820-00-005-7396, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 11 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-00-005-7396 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.834 INCHES NOMINAL IN |
| Flange Diameter | 1.620 INCHES MINIMUM AND 1.630 INCHES MAXIMUM IN |
| Body Outside Diameter | 1.845 INCHES MINIMUM AND 1.870 INCHES MAXIMUM IN |
| Hardness Rating | 25.0 ROCKWELL C MINIMUM AND 30.0 ROCKWELL C MAXIMUM OVERALL |
| Style Designator | PLAIN FLANGED |
| Body Inside Diameter | 0.875 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Under Flange Height | 1.433 INCHES MINIMUM AND 1.443 INCHES MAXIMUM IN |
| Material | STEEL CORROSION RESISTING OVERALL |
| Seat Angle in Deg | 0.750 NOMINAL |
| 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 |
|---|---|
| 383V304 | 3/9 Design control — primary reference Grimes Aerospace Co |
NSN 4820-00-005-7396 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-00-005-7396: Flange Seat to Disk End Height: 0.834 INCHES NOMINAL IN; Flange Diameter: 1.620 INCHES MINIMUM AND 1.630 INCHES MAXIMUM IN; Body Outside Diameter: 1.845 INCHES MINIMUM AND 1.870 INCHES MAXIMUM IN; Hardness Rating: 25.0 ROCKWELL C MINIMUM AND 30.0 ROCKWELL C MAXIMUM OVERALL. 11 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.