The Gear,worm Wheel, cataloged under National Stock Number 3020-00-019-0657, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 21 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 3020-00-019-0657 |
| Item Name | Gear,worm Wheel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Keyway Nominal Width | 0.312 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 1.375 INCHES BOTH ENDS IN |
| Helix Angle | 40.0000 DEGREES |
| Hub Nominal Diameter | 2.125 INCHES FIRST END IN |
| Hub Nominal Diameter | 2.875 INCHES SECOND END IN |
| Nominal Distance Between Body Face and Recessed Hub End | 0.125 INCHES SECOND END IN |
| Teeth Quantity | 29 |
| Body Style | WEBBED, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.688 INCHES FIRST END IN |
| Throat Nominal Radius | 0.875 INCHES IN |
| Face Type | CONCAVE |
| Style Designator | ONE PROTRUDING HUB, ONE RECESSED HUB |
| Pitch Diameter | 8.0620 INCHES NOMINAL IN |
| Hub Style Designator | PLAIN BOTH ENDS |
| Nominal Outside Diameter | 8.438 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 0.812 INCHES BOTH ENDS IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | COPPER ALLOY OVERALL |
| 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 |
|---|---|
| DG0829F13 | 3/9 Design control — primary reference Imo Industries Inc Delroyd Worm Gear Div |
| DG0829F13 | 5/9 Secondary reference Siemens Energy, Inc. |
NSN 3020-00-019-0657 is a Gear,worm Wheel, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-00-019-0657: Keyway Nominal Width: 0.312 INCHES BOTH ENDS IN; Bore Nominal Diameter: 1.375 INCHES BOTH ENDS IN; Helix Angle: 40.0000 DEGREES; Hub Nominal Diameter: 2.125 INCHES FIRST END IN. 21 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.