The Gear Operator,valve, cataloged under National Stock Number 4820-01-660-8239, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Cooper Cameron Corp Cooper Cameron Valves Div. Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-660-8239 |
| Primary Part Number | 4056-11321 |
| Item Name | Gear Operator,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Cooper Cameron Corp Cooper Cameron Valves Div |
| Status | ACTIVE |
| Valve Type for Which Designed | BUTTERFLY |
| Features Provided | HANDWHEEL |
| Material | IRON |
| Gear Ratio | 38 TO 1 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 4056-11321 PRIMARY | Cooper Cameron Corp Cooper Cameron Valves Div (USA) |
| Reference | Meaning |
|---|---|
| C4056-5TO8IN | C/1 Advisory reference — outside the item-of-supply concept Cooper Cameron Corp Cooper Cameron Valves Div |
NSN 4820-01-660-8239 is a Gear Operator,valve, manufactured by Cooper Cameron Corp Cooper Cameron Valves Div, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-660-8239 has 1 manufacturer part number on file: 4056-11321 (Cooper Cameron Corp Cooper Cameron Valves Div).
Key specifications for 4056-11321: Valve Type for Which Designed: BUTTERFLY; Features Provided: HANDWHEEL; Special Features: OPERATOR FOR VALVE SIZES 5.00 TO 8.00 INCHES IN; Material: IRON. 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.