The Gear,spur, cataloged under National Stock Number 3020-01-179-6491, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 13 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-01-179-6491 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Keyway Nominal Width | 5.0 MILLIMETERS BOTH ENDS MM |
| Bore Nominal Diameter | 20.0 MILLIMETERS BOTH ENDS MM |
| Teeth Quantity | 13 |
| Body Style | PLAIN, SOLID |
| Bore Style | W/ 2 KEYWAYS BOTH ENDS |
| Style Designator | HUBLESS |
| Pitch Diameter | 34.0 MILLIMETERS NOMINAL MM |
| Tooth Form | SPECIAL |
| Nominal Outside Diameter | 40.0 MILLIMETERS MM |
| Nominal Distance From Bore Center to Keyway Bottom | 12.5 MILLIMETERS BOTH ENDS MM |
| Pressure Angle | 15.0000 DEGREES |
| Material | STEEL OVERALL |
| Face Nominal Width | 29.0 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 |
|---|---|
| 1243347 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-01-179-6491 is a Gear,spur, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-01-179-6491: Keyway Nominal Width: 5.0 MILLIMETERS BOTH ENDS MM; Bore Nominal Diameter: 20.0 MILLIMETERS BOTH ENDS MM; Teeth Quantity: 13; Body Style: PLAIN, SOLID. 13 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.