The Seat,valve, cataloged under National Stock Number 4820-00-083-4369, 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14 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-083-4369 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.218 INCHES NOMINAL IN |
| Flange Diameter | 1.160 INCHES NOMINAL IN |
| Body Outside Diameter | 0.932 INCHES NOMINAL IN |
| Criticality Code Justification | CQKW |
| Body Stepped Inside Diameter | 0.531 INCHES NOMINAL THIRD STEP IN |
| Body Stepped Inside Diameter | 0.6675 INCHES MINIMUM AND 0.6680 INCHES MAXIMUM FIRST STEP IN |
| Body Stepped Inside Diameter | 0.685 INCHES NOMINAL SECOND STEP IN |
| Style Designator | PLAIN FLANGED |
| Material Document and Classification | MIL-S-7720 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Surface Treatment | PASSIVATE OVERALL |
| Under Flange Height | 0.942 INCHES NOMINAL IN |
| Material | STEEL COMP 302 OR STEEL COMP 303 OVERALL |
| Seat Angle in Deg | 27.000 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 | Y |
| Reference | Meaning |
|---|---|
| 1461-586676 | 5/9 Secondary reference Parker-Hannifin Corporation Dba Pneutronics Div Corporate Headquarters |
| 1461-586676 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-00-083-4369 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-00-083-4369: Flange Seat to Disk End Height: 0.218 INCHES NOMINAL IN; Flange Diameter: 1.160 INCHES NOMINAL IN; Body Outside Diameter: 0.932 INCHES NOMINAL IN; Criticality Code Justification: CQKW. 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.