The Gear,spur, cataloged under National Stock Number 3020-01-042-9770, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 25 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 3020-01-042-9770 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Teeth Quantity | 525 |
| Second Step Nominal Diameter | 1.3770 INCHES FIRST END IN |
| Body Style | PLAIN, SOLID |
| Third Step Nominal Diameter | 1.542 INCHES FIRST END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 0.9375 INCHES SECOND END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 3.1875 INCHES FIRST END IN |
| First Step Nominal Length | 1.2500 INCHES BOTH ENDS IN |
| Second Step Nominal Length | 0.625 INCHES FIRST END IN |
| Style Designator | PROTRUDING HUBS |
| Pitch Diameter | 8.2035 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| First Step Nominal Diameter | 1.127 INCHES FIRST END IN |
| First Step Nominal Diameter | 1.5500 INCHES SECOND END IN |
| Features Provided | CASEHARDENED |
| Hub Style Designator | 3 STEPS FIRST END |
| Hub Style Designator | 1 STEP SECOND END |
| End Nominal Length | 1.0625 INCHES FIRST END IN |
| End Nominal Length | 0.6875 INCHES SECOND END IN |
| Nominal Outside Diameter | 8.2348 INCHES IN |
| End Nominal Diameter | 0.7190 INCHES FIRST END IN |
| End Nominal Diameter | 1.3770 INCHES SECOND END IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL OVERALL |
| Third Step Nominal Length | 0.250 INCHES FIRST END IN |
| Face Nominal Width | 1.000 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 |
|---|---|
| 617F204PC2 | 5/2 Secondary reference U.S. Government activity |
| 1122F41H01 | 3/2 Design control — primary reference U.S. Government activity |
| 1122F41 | 5/2 Secondary reference U.S. Government activity |
NSN 3020-01-042-9770 is a Gear,spur, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-01-042-9770: Teeth Quantity: 525; Second Step Nominal Diameter: 1.3770 INCHES FIRST END IN; Body Style: PLAIN, SOLID; Third Step Nominal Diameter: 1.542 INCHES FIRST END IN. 25 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.