The Gear,worm Wheel, cataloged under National Stock Number 3020-00-455-2174, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-455-2174 |
| Item Name | Gear,worm Wheel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Keyway Nominal Width | 0.125 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 0.500 INCHES BOTH ENDS IN |
| Helix Angle | 5.8666 DEGREES |
| Teeth Quantity | 21 |
| Body Style | PLAIN, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Throat Nominal Radius | 0.651 INCHES IN |
| Face Type | CONCAVE |
| Style Designator | HUBLESS |
| Pitch Diameter | 1.1998 INCHES NOMINAL IN |
| Nominal Outside Diameter | 1.345 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 0.307 INCHES BOTH ENDS IN |
| Pressure Angle | 25.0000 DEGREES |
| Material | COPPER ALLOY OVERALL |
| Face Nominal Width | 0.687 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 |
|---|---|
| 6651585 | 3/9 Design control — primary reference Sieh Inc Dba United Plumbing |
| 21C1530 | D/9 Drawing number reference only U.S. Government activity |
| 21C1530-222 | 5/9 Secondary reference General Electric Company |
NSN 3020-00-455-2174 is a Gear,worm Wheel, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-00-455-2174: Keyway Nominal Width: 0.125 INCHES BOTH ENDS IN; Bore Nominal Diameter: 0.500 INCHES BOTH ENDS IN; Helix Angle: 5.8666 DEGREES; Teeth Quantity: 21. 16 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.