The Gear,worm Wheel, cataloged under National Stock Number 3020-00-931-4640, 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 Yale Industrial Products, Inc. Div Duff Norton Company. Government technical data includes 18 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 | 3020-00-931-4640 |
| Primary Part Number | SK2006-4 |
| Item Name | Gear,worm Wheel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Yale Industrial Products, Inc. Div Duff Norton Company |
| Status | ACTIVE |
| Keyway Nominal Width | 0.313 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 1.000 INCHES BOTH ENDS IN |
| Helix Angle | 19.9831 DEGREES |
| Hub Nominal Diameter | 1.878 INCHES BOTH ENDS IN |
| Teeth Quantity | 24 |
| Body Style | PLAIN, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.281 INCHES BOTH ENDS IN |
| Face Type | CONCAVE |
| Style Designator | PROTRUDING HUBS |
| Pitch Diameter | 3.0000 INCHES NOMINAL IN |
| Hub Style Designator | PLAIN BOTH ENDS |
| Nominal Outside Diameter | 3.375 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 0.655 INCHES BOTH ENDS IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | COPPER ALLOY OVERALL |
| Face Nominal Width | 1.438 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| SK2006-4 PRIMARY | Yale Industrial Products, Inc. Div Duff Norton Company (USA) |
NSN 3020-00-931-4640 is a Gear,worm Wheel, manufactured by Yale Industrial Products, Inc. Div Duff Norton Company, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-931-4640 has 1 manufacturer part number on file: SK2006-4 (Yale Industrial Products, Inc. Div Duff Norton Company).
Key specifications for SK2006-4: Keyway Nominal Width: 0.313 INCHES BOTH ENDS IN; Bore Nominal Diameter: 1.000 INCHES BOTH ENDS IN; Helix Angle: 19.9831 DEGREES; Hub Nominal Diameter: 1.878 INCHES BOTH ENDS IN. 18 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.
NSN 3020-00-931-4640 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.