The Seat,valve, cataloged under National Stock Number 4820-01-198-2836, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 4 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-198-2836 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flange Diameter | 4.875 INCHES NOMINAL IN |
| Body Outside Diameter | 3.375 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| 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 |
|---|---|
| 662-5J | D/9 Drawing number reference only U.S. Government activity |
| 662-5-18 | 3/2 Design control — primary reference U.S. Government activity |
| 662-5-18 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 662-5J PIECE 18 | 5/2 Secondary reference U.S. Government activity |
NSN 4820-01-198-2836 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-198-2836: Flange Diameter: 4.875 INCHES NOMINAL IN; Body Outside Diameter: 3.375 INCHES NOMINAL IN; Material: STEEL OVERALL; Seating Surface Shape: ANGULAR. 4 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.