The Gear,worm Wheel, cataloged under National Stock Number 3020-00-239-0683, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-239-0683 |
| Item Name | Gear,worm Wheel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Hub Nominal Diameter | 3.500 INCHES FIRST END IN |
| Teeth Quantity | 25 |
| Tooth Direction | RIGHT |
| Nominal Distance Between Body Face and Protruding Hub End | 1.000 INCHES FIRST END IN |
| Nominal Overall Length | 2.875 INCHES IN |
| Style Designator | PROTRUDING HUBS |
| Material Document and Classification | MIL-B-16540,GRADE A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 8.2690 INCHES NOMINAL IN |
| Hub Style Designator | PLAIN BOTH ENDS |
| Nominal Outside Diameter | 8.7500 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 1.3125 INCHES BOTH ENDS IN |
| Pressure Angle | 27.5000 DEGREES |
| Material | COPPER ALLOY 903 OVERALL |
| Mating Thread Lead Quantity | 2 |
| Face Nominal Width | 1.750 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 |
| Reference | Meaning |
|---|---|
| W5ONX1 | 3/9 Design control — primary reference Imo Industries Inc Delroyd Worm Gear Div |
| W5ONX1 | 5/9 Secondary reference Siemens Energy, Inc. |
NSN 3020-00-239-0683 is a Gear,worm Wheel, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-00-239-0683: Hub Nominal Diameter: 3.500 INCHES FIRST END IN; Teeth Quantity: 25; Tooth Direction: RIGHT; Nominal Distance Between Body Face and Protruding Hub End: 1.000 INCHES FIRST END IN. 15 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.