The Gear,spur, cataloged under National Stock Number 3020-00-623-5942, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. The manufacturer of record is De Havilland Aircraft of Canada Limited. Government technical data includes 11 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-623-5942 |
| Primary Part Number | C3CF139-3 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | De Havilland Aircraft of Canada Limited |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.250 INCHES BOTH ENDS IN |
| Teeth Quantity | 16 |
| Body Style | PLAIN, SOLID |
| Counterbore Nominal Diameter | 0.375 INCHES FIRST END IN |
| Bore Style | W/COUNTERBORE BOTH ENDS |
| Style Designator | HUBLESS |
| Pitch Diameter | 0.5000 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Material | COPPER ALLOY OVERALL |
| Counterbore Nominal Depth | 0.100 INCHES FIRST END IN |
| Face Nominal Width | 0.340 INCHES IN |
| 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 |
|---|---|
| C3CF139-3 PRIMARY | De Havilland Aircraft of Canada Limited (CAN) |
NSN 3020-00-623-5942 is a Gear,spur, manufactured by De Havilland Aircraft of Canada Limited, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-623-5942 has 1 manufacturer part number on file: C3CF139-3 (De Havilland Aircraft of Canada Limited).
Key specifications for C3CF139-3: Bore Nominal Diameter: 0.250 INCHES BOTH ENDS IN; Teeth Quantity: 16; Body Style: PLAIN, SOLID; Counterbore Nominal Diameter: 0.375 INCHES FIRST END IN. 11 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.