The Seat,valve, cataloged under National Stock Number 4820-00-343-2117, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 13 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-00-343-2117 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.625 INCHES NOMINAL IN |
| Flange Diameter | 5.6190 INCHES MINIMUM AND 5.6200 INCHES MAXIMUM IN |
| Body Outside Diameter | 5.2520 INCHES MINIMUM AND 5.2525 INCHES MAXIMUM IN |
| Seal Accommodation Type | GROOVED |
| Taper Minor Diameter | 4.3730 INCHES MINIMUM AND 4.3770 INCHES MAXIMUM IN |
| Style Designator | PLAIN FLANGED |
| Taper Major Diameter | 4.5620 INCHES NOMINAL IN |
| Body Inside Diameter | 4.3750 INCHES MINIMUM AND 4.3755 INCHES MAXIMUM IN |
| Surface Treatment | CHROMIUM SEAT |
| Under Flange Height | 0.875 INCHES NOMINAL IN |
| Material | STEEL COMP F1 SEAT |
| Seat Angle in Deg | 60.000 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 |
|---|---|
| S275-4 | 5/9 Secondary reference U.S. Government activity |
| NL2071-1 | 3/9 Design control — primary reference U.S. Government activity |
NSN 4820-00-343-2117 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-00-343-2117: Flange Seat to Disk End Height: 0.625 INCHES NOMINAL IN; Flange Diameter: 5.6190 INCHES MINIMUM AND 5.6200 INCHES MAXIMUM IN; Body Outside Diameter: 5.2520 INCHES MINIMUM AND 5.2525 INCHES MAXIMUM IN; Seal Accommodation Type: GROOVED. 13 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.