The Gear Operator,valve, cataloged under National Stock Number 4820-01-500-9563, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Transdigm Inc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-500-9563 |
| Primary Part Number | 21011120-001-244 |
| Item Name | Gear Operator,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Transdigm Inc |
| Status | ACTIVE |
| 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 |
|---|---|
| 21011120-001-244 PRIMARY | Transdigm Inc (USA) |
| Reference | Meaning |
|---|---|
| 2101120-001-244 | C/1 Advisory reference — outside the item-of-supply concept Transdigm Inc |
NSN 4820-01-500-9563 is a Gear Operator,valve, manufactured by Transdigm Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-500-9563 has 1 manufacturer part number on file: 21011120-001-244 (Transdigm Inc).
Key specifications for 21011120-001-244: Special Features: QUARTER TURN LOW TO HIGH TORQUE HANDWHEEL (2) LOCAL TO REMOTE ACTUATOR SYSTEM WITH 244 IN LONG CONTROL CABLE; .500-20UNF-2A MOUNTING STUDS; 5IN DIAM BOLT CIRCLE; SYSTEM OUTPUT CAPACITY 70FT. LB. TORQUE WITH 135 FT. LB. MAX OPERATING TORQUE; 20-350 DEG F OPERATING TEMP; 20,000 CYCLES SYSTEM LIFE @ RATED TORQUE; VALVE POSITION INDICATORS LOCATED ON LOCAL AND REMOTE ACTUATORS; BRASS HOUSING AND HANDWHEELS; CRES CABLE AND HARDWARE; PLATED CARBON STEEL/ CAST IRON PACKS AND GEARS. A; Part Name Assigned by Controlling Agency: LOCAL AND REMOTE ACTUATOR WITH 244 INCH CONTROL CABLE IN; End Item Identification: MARINE SYSTEM. 0 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.