The Gear,spur, cataloged under National Stock Number 3020-01-174-9143, 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25 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-174-9143 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.375 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 0.628 INCHES FIRST END IN |
| Hub Nominal Diameter | 1.122 INCHES SECOND END IN |
| Teeth Quantity | 47 |
| Body Style | PLAIN, WITH LIGHTENING HOLES |
| Counterbore Nominal Diameter | 0.432 INCHES BOTH ENDS IN |
| Bore Style | W/COUNTERBORE BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.421 INCHES BOTH ENDS IN |
| Nominal Distance Between Body Face and Protruding Hub End | 2.397 INCHES FIRST END IN |
| Hardness Rating | 80.0 ROCKWELL C NOMINAL OVERALL |
| Nominal Overall Length | 2.984 INCHES IN |
| Style Designator | PROTRUDING HUBS |
| Material Document and Classification | AMS 6265 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 2.3500 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | 1 GROOVE BOTH ENDS |
| Nominal Outside Diameter | 2.930 INCHES IN |
| Nominal Distance From End to First Groove | 0.072 INCHES BOTH ENDS IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP E9310 OVERALL |
| First Groove Nominal Diameter | 0.574 INCHES FIRST END IN |
| First Groove Nominal Diameter | 1.043 INCHES SECOND END IN |
| Counterbore Nominal Depth | 2.469 INCHES BOTH ENDS IN |
| First Groove Nominal Width | 0.239 INCHES BOTH ENDS IN |
| Face Nominal Width | 0.166 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 735420 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-01-174-9143 is a Gear,spur, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-01-174-9143: Bore Nominal Diameter: 0.375 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.628 INCHES FIRST END IN; Hub Nominal Diameter: 1.122 INCHES SECOND END IN; Teeth Quantity: 47. 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.
NSN 3020-01-174-9143 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.