The Gear Sector,spur, cataloged under National Stock Number 3020-01-073-1831, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 17 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-01-073-1831 |
| Item Name | Gear Sector,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.249 INCHES BOTH ENDS IN |
| Teeth Quantity | 50 |
| Nominal Outside Radius | 0.6366 INCHES IN |
| Bore Style | PLAIN BOTH ENDS |
| Mounting Hole Type and Quantity | 1 THREADED TRANSVERSELY THROUGH HUB FIRST END |
| Nominal Distance Between Body Face and Protruding Hub End | 0.0100 INCHES FIRST END IN |
| Nominal Overall Length | 0.185 INCHES IN |
| Style Designator | PROTRUDING HUB |
| Tooth Form | STANDARD |
| Mounting Hole Nominal Thread Size | 0.089 INCHES TRANSVERSELY THROUGH HUB FIRST END IN |
| Mounting Hole Thread Quantity Per Inch | 40 TRANSVERSELY THROUGH HUB FIRST END |
| Arc Nominal Length | 1.2733 INCHES IN |
| Pitch Radius | 0.5208 INCHES NOMINAL IN |
| Pressure Angle | 25.0000 DEGREES |
| Mounting Hole Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) TRANSVERSELY THROUGH HUB FIRST END |
| Attachment Method | MOUNTING HOLE |
| Face Nominal Width | 0.175 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 |
|---|---|
| 789562-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-01-073-1831 is a Gear Sector,spur, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-01-073-1831: Bore Nominal Diameter: 0.249 INCHES BOTH ENDS IN; Teeth Quantity: 50; Nominal Outside Radius: 0.6366 INCHES IN; Bore Style: PLAIN BOTH ENDS. 17 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.