The Gear,helical, cataloged under National Stock Number 3020-00-901-2158, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 20 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-00-901-2158 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.187 INCHES BOTH ENDS IN |
| Helix Angle | 61.4167 DEGREES |
| Teeth Quantity | 10 |
| Surface Treatment Document and Classification | MIL-C-13924,CL 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Body Style | PLAIN, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | PLAIN BOTH ENDS |
| Mounting Hole Type and Quantity | 2 PLAIN TRANSVERSELY THROUGH FACE |
| Mounting Hole Nominal Diameter | 0.064 INCHES TRANSVERSELY THROUGH FACE IN |
| Teeth Type | SINGLE HELIX |
| Style Designator | HUBLESS |
| Bore Nominal Depth | 0.500 INCHES BOTH ENDS IN |
| Material Document and Classification | ASIS C1212 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 0.3266 INCHES NOMINAL IN |
| Nominal Outside Diameter | 0.357 INCHES IN |
| Surface Treatment | OXIDE OVERALL |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 1212 OVERALL |
| Attachment Method | MOUNTING HOLE |
| Face Nominal Width | 0.500 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 |
|---|---|
| 1061705-2 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-00-901-2158 is a Gear,helical, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-00-901-2158: Bore Nominal Diameter: 0.187 INCHES BOTH ENDS IN; Helix Angle: 61.4167 DEGREES; Teeth Quantity: 10; Surface Treatment Document and Classification: MIL-C-13924,CL 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL. 20 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.