The Valve,butterfly, cataloged under National Stock Number 4820-01-355-3180, 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5 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-355-3180 |
| Item Name | Valve,butterfly |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Style Designator | STRAIGHT THRU |
| Valve Size | 12.000 INCHES IN |
| Mounting Facility | LUG(S) |
| Material | NICKEL ALLOY AND ALUMINUM AND BRONZE BODY |
| Valve Operation Method | MANUAL |
| 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 |
|---|---|
| 12" R285B-666AA-2M | 5/9 Secondary reference U.S. Government activity |
| 920M221 | C/1 Advisory reference — outside the item-of-supply concept Dover Resources, Inc. Div Norriseal |
| 920M221 | 3/9 Design control — primary reference U.S. Government activity |
NSN 4820-01-355-3180 is a Valve,butterfly, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-355-3180: Style Designator: STRAIGHT THRU; Valve Size: 12.000 INCHES IN; Mounting Facility: LUG(S); Material: NICKEL ALLOY AND ALUMINUM AND BRONZE BODY. 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.