The Gear,spur, cataloged under National Stock Number 3020-00-070-2152, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 24 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-070-2152 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 3.688 INCHES COUNTERBORE FIRST END IN |
| Hub Nominal Diameter | 4.938 INCHES FIRST END IN |
| Teeth Quantity | 60 |
| Body Style | WEBBED, SOLID |
| Counterbore Nominal Diameter | 4.748 INCHES COUNTERBORE FIRST END IN |
| Bore Style | W/COUNTERBORE COUNTERBORE FIRST END |
| Mounting Hole Type and Quantity | 16 PLAIN AXIALLY THROUGH FLANGE |
| Nominal Distance Between Body Face and Protruding Hub End | 0.104 INCHES FIRST END IN |
| Precision Classification | QUALITY NUMBER 10 |
| Mounting Hole Nominal Diameter | 0.171 INCHES AND 0.279 INCHES AXIALLY THROUGH FLANGE IN |
| Hardness Rating | 30.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL |
| Style Designator | PROTRUDING HUB, RECESSED BODY |
| Material Document and Classification | FED STD 66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 6.0000 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN FIRST END |
| Nominal Outside Diameter | 6.198 INCHES IN |
| Surface Treatment | TIN AND CADMIUM OVERALL |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 4340 OVERALL |
| Counterbore Nominal Depth | 0.260 INCHES COUNTERBORE FIRST END IN |
| Attachment Method | MOUNTING HOLE |
| Body Recess Nominal Depth | 0.092 INCHES SECOND END IN |
| Face Nominal Width | 0.438 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 |
|---|---|
| K674717-17 | 3/2 Design control — primary reference U.S. Government activity |
| K674717-17 | 5/2 Secondary reference U.S. Government activity |
NSN 3020-00-070-2152 is a Gear,spur, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-00-070-2152: Bore Nominal Diameter: 3.688 INCHES COUNTERBORE FIRST END IN; Hub Nominal Diameter: 4.938 INCHES FIRST END IN; Teeth Quantity: 60; Body Style: WEBBED, SOLID. 24 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.