The Gear,spur, cataloged under National Stock Number 3020-00-293-4649, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 26 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-293-4649 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Keyway Nominal Width | 0.189 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 1.390 INCHES BOTH ENDS IN |
| Teeth Quantity | 78 |
| Body Style | WEBBED, WITH LIGHTENING HOLES |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.080 INCHES BOTH ENDS IN |
| First Step Nominal Length | 0.060 INCHES FIRST END IN |
| First Step Nominal Length | 0.050 INCHES SECOND END IN |
| Hardness Rating | 22.0 ROCKWELL SUPERFICIAL 30-N NOMINAL TEETH |
| Hardness Rating | 24.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM HUB |
| Nominal Overall Length | 0.875 INCHES IN |
| Style Designator | PROTRUDING HUBS |
| Pitch Diameter | 9.7500 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| First Step Nominal Diameter | 2.000 INCHES SECOND END IN |
| First Step Nominal Diameter | 2.000 INCHES FIRST END IN |
| Hub Style Designator | 1 STEP BOTH ENDS |
| End Nominal Length | 0.030 INCHES SECOND END IN |
| End Nominal Length | 0.020 INCHES FIRST END IN |
| Nominal Outside Diameter | 9.947 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 0.791 INCHES BOTH ENDS IN |
| End Nominal Diameter | 1.720 INCHES FIRST END IN |
| End Nominal Diameter | 1.720 INCHES SECOND END IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL OVERALL |
| Face Nominal Width | 0.715 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 |
|---|---|
| 61867 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-00-293-4649 is a Gear,spur, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 1220-00-590-6114. Verify interchangeability with system specifications before substitution.
Key specifications for 3020-00-293-4649: Keyway Nominal Width: 0.189 INCHES BOTH ENDS IN; Bore Nominal Diameter: 1.390 INCHES BOTH ENDS IN; Teeth Quantity: 78; Body Style: WEBBED, WITH LIGHTENING HOLES. 26 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.