The Gear,spur, cataloged under National Stock Number 3020-01-018-7680, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 30 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-01-018-7680 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.094 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 0.125 INCHES SECOND END IN |
| Teeth Quantity | 72 |
| Second Step Nominal Diameter | 0.250 INCHES FIRST END IN |
| Surface Treatment Document and Classification | MIL-F-14072,FINISH E300 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Body Style | PLAIN, SOLID |
| Counterbore Nominal Diameter | 0.125 INCHES FIRST END IN |
| Third Step Nominal Diameter | 0.140 INCHES FIRST END IN |
| Bore Style | W/COUNTERBORE BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.039 INCHES SECOND END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 4.149 INCHES FIRST END IN |
| First Step Nominal Length | 0.399 INCHES FIRST END IN |
| Precision Classification | QUALITY NUMBER 10 |
| Hardness Rating | 32.0 ROCKWELL C MINIMUM AND 37.0 ROCKWELL C MAXIMUM HUB |
| Second Step Nominal Length | 0.040 INCHES FIRST END IN |
| Style Designator | PROTRUDING HUBS |
| Material Document and Classification | QQ-S-764,COND A FED SPEC SINGLE MATERIAL RESPONSE HUB |
| Material Document and Classification | QQ-S-764,COND A FED SPEC SINGLE MATERIAL RESPONSE TEETH |
| Pitch Diameter | 0.7500 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| First Step Nominal Diameter | 0.187 INCHES FIRST END IN |
| Hub Style Designator | 3 STEPS FIRST END |
| Hub Style Designator | PLAIN SECOND END |
| End Nominal Length | 0.091 INCHES FIRST END IN |
| Nominal Outside Diameter | 0.771 INCHES IN |
| Surface Treatment | PASSIVATE OVERALL |
| End Nominal Diameter | 0.160 INCHES FIRST END IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 303 HUB |
| Material | STEEL COMP 416 TEETH |
| 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 |
|---|---|
| 484108 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-01-018-7680 is a Gear,spur, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-01-018-7680: Bore Nominal Diameter: 0.094 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.125 INCHES SECOND END IN; Teeth Quantity: 72; Second Step Nominal Diameter: 0.250 INCHES FIRST END IN. 30 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.