The Gear,worm Wheel, cataloged under National Stock Number 3020-00-939-8052, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 18 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 3020-00-939-8052 |
| Item Name | Gear,worm Wheel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Keyway Nominal Width | 0.500 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 2.122 INCHES BOTH ENDS IN |
| Helix Angle | 5.0000 DEGREES |
| Hub Nominal Diameter | 3.492 INCHES BOTH ENDS IN |
| Teeth Quantity | 43 |
| Body Style | PLAIN, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | W/ 4 KEYWAYS BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.250 INCHES SECOND END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 0.500 INCHES FIRST END IN |
| Face Type | STRAIGHT |
| Style Designator | PROTRUDING HUBS |
| Hub Style Designator | PLAIN BOTH ENDS |
| Nominal Outside Diameter | 6.750 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 1.293 INCHES BOTH ENDS IN |
| Pressure Angle | 25.0000 DEGREES |
| Material | COPPER ALLOY OVERALL |
| Face Nominal Width | 1.500 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 |
|---|---|
| DG0143E11 | 5/9 Secondary reference Siemens Energy, Inc. |
| DG0143E11 | 3/9 Design control — primary reference Imo Industries Inc Delroyd Worm Gear Div |
NSN 3020-00-939-8052 is a Gear,worm Wheel, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-00-939-8052: Keyway Nominal Width: 0.500 INCHES BOTH ENDS IN; Bore Nominal Diameter: 2.122 INCHES BOTH ENDS IN; Helix Angle: 5.0000 DEGREES; Hub Nominal Diameter: 3.492 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.
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.