The Gear,spur, cataloged under National Stock Number 3020-00-528-0657, 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24 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 3020-00-528-0657 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.3752 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 0.434 INCHES FIRST END IN |
| Teeth Quantity | 60 |
| Clamping Surface Nominal Length | 0.1875 INCHES FIRST END IN |
| Body Style | PLAIN, SOLID |
| Bore Style | PLAIN BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.215 INCHES SECOND END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 0.227 INCHES FIRST END IN |
| First Step Nominal Length | 0.062 INCHES SECOND END IN |
| Style Designator | PROTRUDING HUBS |
| Material Document and Classification | QQ-B-611-CANCELED FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 1.2500 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| First Step Nominal Diameter | 0.750 INCHES SECOND END IN |
| Hub Style Designator | SPLIT FIRST END |
| Hub Style Designator | 1 STEP SECOND END |
| End Nominal Length | 0.151 INCHES SECOND END IN |
| Nominal Outside Diameter | 1.291 INCHES IN |
| Surface Treatment | CHROMATE OVERALL |
| End Nominal Diameter | 0.4992 INCHES SECOND END IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | COPPER ALLOY OVERALL |
| Attachment Method | CLAMP |
| Face Nominal Width | 0.092 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 |
|---|---|
| 505-1995-002 | 5/9 Secondary reference Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems |
| 505-1995-002 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-00-528-0657 is a Gear,spur, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-00-528-0657: Bore Nominal Diameter: 0.3752 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.434 INCHES FIRST END IN; Teeth Quantity: 60; Clamping Surface Nominal Length: 0.1875 INCHES FIRST END IN. 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.