The Seat,valve, cataloged under National Stock Number 4820-01-186-9433, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 5 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-186-9433 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Style Designator | PLAIN |
| Material Document and Classification | ASTM B148 ALLOY 9C ASSN STD SINGLE MATERIAL RESPONSE SEAT |
| Body Inside Diameter | 6.000 INCHES NOMINAL IN |
| Material | COPPER ALLOY 954 SEAT |
| 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 |
|---|---|
| 51729B006 | 3/9 Design control — primary reference U.S. Government activity |
| 729B006 | 5/9 Secondary reference U.S. Government activity |
| 51729B006 | C/1 Advisory reference — outside the item-of-supply concept Dover Resources, Inc. Div Norriseal |
NSN 4820-01-186-9433 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-186-9433: Style Designator: PLAIN; Material Document and Classification: ASTM B148 ALLOY 9C ASSN STD SINGLE MATERIAL RESPONSE SEAT; Body Inside Diameter: 6.000 INCHES NOMINAL IN; Material: COPPER ALLOY 954 SEAT. 5 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.