The Gear,spur, cataloged under National Stock Number 3020-00-759-1897, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 21 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-00-759-1897 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 1.379 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 1.810 INCHES BOTH ENDS IN |
| Teeth Quantity | 97 |
| Body Style | WEBBED, WITH LIGHTENING HOLES |
| Counterbore Nominal Diameter | 1.501 INCHES BOTH ENDS IN |
| Bore Style | STRAIGHT SPLINE BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 1.180 INCHES FIRST END IN |
| Hardness Rating | 27.0 ROCKWELL C NOMINAL HUB |
| Hardness Rating | 64.0 ROCKWELL SUPERFICIAL 45-N MINIMUM AND 69.0 ROCKWELL SUPERFICIAL 45-N MAXIMUM TEETH |
| Nominal Overall Length | 0.993 INCHES IN |
| Style Designator | PROTRUDING HUBS |
| Material Document and Classification | MIL-S-7493,COMP 4620 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 4.8500 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN BOTH ENDS |
| Spline Quantity | 23 BOTH ENDS |
| Nominal Outside Diameter | 4.947 INCHES IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 4620 OVERALL |
| Counterbore Nominal Depth | 0.243 INCHES BOTH ENDS IN |
| Face Nominal Width | 0.750 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 |
|---|---|
| 42801D51 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-00-759-1897 is a Gear,spur, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-00-759-1897: Bore Nominal Diameter: 1.379 INCHES BOTH ENDS IN; Hub Nominal Diameter: 1.810 INCHES BOTH ENDS IN; Teeth Quantity: 97; Body Style: WEBBED, WITH LIGHTENING HOLES. 21 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.