The Gear,worm Wheel, cataloged under National Stock Number 3020-01-222-7678, 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15 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-222-7678 |
| Item Name | Gear,worm Wheel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Keyway Nominal Width | 0.374 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 1.620 INCHES BOTH ENDS IN |
| Helix Angle | 4.9000 DEGREES |
| Teeth Quantity | 40 |
| Body Style | WEBBED, SOLID |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.875 INCHES BOTH ENDS IN |
| Nominal Overall Length | 2.625 INCHES IN |
| Style Designator | PROTRUDING HUBS |
| Pitch Diameter | 4.7500 INCHES NOMINAL IN |
| Nominal Outside Diameter | 5.050 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 1.005 INCHES BOTH ENDS IN |
| Pressure Angle | 30.0000 DEGREES |
| Material | COPPER ALLOY OVERALL |
| Face Nominal Width | 0.875 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 |
|---|---|
| 7340-300 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-01-222-7678 is a Gear,worm Wheel, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5110-01-336-5695. Verify interchangeability with system specifications before substitution.
Key specifications for 3020-01-222-7678: Keyway Nominal Width: 0.374 INCHES BOTH ENDS IN; Bore Nominal Diameter: 1.620 INCHES BOTH ENDS IN; Helix Angle: 4.9000 DEGREES; Teeth Quantity: 40. 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.