The Seat,valve, cataloged under National Stock Number 4820-00-529-6984, 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10 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-00-529-6984 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.105 INCHES MINIMUM AND 0.115 INCHES MAXIMUM IN |
| Flange Diameter | 0.680 INCHES MINIMUM AND 0.682 INCHES MAXIMUM IN |
| Body Outside Diameter | 0.497 INCHES MINIMUM AND 0.498 INCHES MAXIMUM IN |
| Style Designator | PLAIN FLANGED |
| Body Inside Diameter | 0.310 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Under Flange Height | 0.200 INCHES NOMINAL IN |
| Material | STEEL COMP 416 OVERALL |
| Seat Angle in Deg | 45.000 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 |
|---|---|
| 1008994 | 3/9 Design control — primary reference Allied-Signal Inc Dba Allied-Signal Aerospace Co Electrodynamics Div |
NSN 4820-00-529-6984 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-00-529-6984: Flange Seat to Disk End Height: 0.105 INCHES MINIMUM AND 0.115 INCHES MAXIMUM IN; Flange Diameter: 0.680 INCHES MINIMUM AND 0.682 INCHES MAXIMUM IN; Body Outside Diameter: 0.497 INCHES MINIMUM AND 0.498 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.