The Seat,valve, cataloged under National Stock Number 4820-00-623-8754, 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11 specifications, cited from the U.S. Government catalog. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-623-8754 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.125 INCHES NOMINAL IN |
| Flange Diameter | 0.859 INCHES NOMINAL IN |
| Body Outside Diameter | 0.361 INCHES MINIMUM AND 0.362 INCHES MAXIMUM IN |
| Seal Accommodation Type | RECESSED |
| Hardness Rating | 325.0 BRINELL STANDARD MINIMUM AND 350.0 BRINELL STANDARD MAXIMUM BODY |
| Style Designator | PLAIN FLANGED |
| Material Document and Classification | QQ-S-763,CLASS 410 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Body Inside Diameter | 0.219 INCHES NOMINAL IN |
| Under Flange Height | 0.438 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| 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 |
|---|---|
| 200110AFPC459 | 5/9 Secondary reference U.S. Government activity |
| 5121B | 3/9 Design control — primary reference U.S. Government activity |
| 200103UPC237 | 5/9 Secondary reference U.S. Government activity |
| 200103UPC237 | 5/9 Secondary reference U.S. Government activity |
| 3287223PC237 | 5/2 Secondary reference U.S. Government activity |
| 3298029PC459 | 5/2 Secondary reference U.S. Government activity |
NSN 4820-00-623-8754 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-00-623-8754: Flange Seat to Disk End Height: 0.125 INCHES NOMINAL IN; Flange Diameter: 0.859 INCHES NOMINAL IN; Body Outside Diameter: 0.361 INCHES MINIMUM AND 0.362 INCHES MAXIMUM IN; Seal Accommodation Type: RECESSED. 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.