The Gear,spur, cataloged under National Stock Number 3020-01-275-4289, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 22 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-01-275-4289 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 4.0 MILLIMETERS BOTH ENDS MM |
| Hub Nominal Diameter | 7.9 MILLIMETERS FIRST END MM |
| Teeth Quantity | 72 |
| Body Style | PLAIN, SOLID |
| Counterbore Nominal Diameter | 2.0 MILLIMETERS BOTH ENDS MM |
| Bore Style | W/COUNTERBORE BOTH ENDS |
| Mounting Hole Type and Quantity | 1 THREADED TRANSVERSELY THROUGH HUB FIRST END |
| Nominal Distance Between Body Face and Protruding Hub End | 6.6 MILLIMETERS FIRST END MM |
| Style Designator | PROTRUDING HUB |
| Pitch Diameter | 36.0 MILLIMETERS NOMINAL MM |
| Hub Style Designator | 1 GROOVE FIRST END |
| Mounting Hole Nominal Thread Size | 1.0 MILLIMETERS TRANSVERSELY THROUGH HUB FIRST END MM |
| Nominal Outside Diameter | 37.0 MILLIMETERS MM |
| Nominal Distance From End to First Groove | 4.5 MILLIMETERS FIRST END MM |
| Pressure Angle | 2.0000 DEGREES |
| Material | ALUMINUM ALLOY 7075 OVERALL |
| First Groove Nominal Diameter | 7.3 MILLIMETERS FIRST END MM |
| Counterbore Nominal Depth | 0.3 MILLIMETERS BOTH ENDS MM |
| First Groove Nominal Width | 0.7 MILLIMETERS FIRST END MM |
| Mounting Hole Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) TRANSVERSELY THROUGH HUB FIRST END |
| Attachment Method | MOUNTING HOLE |
| Face Nominal Width | 1.3 MILLIMETERS MM |
| 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 |
|---|---|
| A3026434 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-01-275-4289 is a Gear,spur, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-01-275-4289: Bore Nominal Diameter: 4.0 MILLIMETERS BOTH ENDS MM; Hub Nominal Diameter: 7.9 MILLIMETERS FIRST END MM; Teeth Quantity: 72; Body Style: PLAIN, SOLID. 22 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.