The Gear,helical, cataloged under National Stock Number 3020-01-272-8744, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 17 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-272-8744 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Keyway Nominal Width | 0.627 INCHES BOTH ENDS IN |
| Helix Angle | 15.6250 DEGREES |
| Teeth Quantity | 34 |
| Body Style | PLAIN, SOLID |
| Tooth Direction | LEFT |
| Bore Style | TAPERED W/KEYWAY BOTH ENDS |
| Precision Classification | QUALITY NUMBER 8 |
| Teeth Type | SINGLE HELIX |
| Style Designator | HUBLESS |
| Taper Major Nominal Diameter | 2.376 INCHES FIRST END IN |
| Pitch Diameter | 4.4129 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Nominal Outside Diameter | 4.613 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 1.466 INCHES FIRST END IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 4340 OR STEEL COMP 4140 OVERALL |
| Face Nominal Width | 2.750 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 |
|---|---|
| 4847491 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-01-272-8744 is a Gear,helical, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-01-272-8744: Keyway Nominal Width: 0.627 INCHES BOTH ENDS IN; Helix Angle: 15.6250 DEGREES; Teeth Quantity: 34; Body Style: PLAIN, SOLID. 17 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.