Description
The gear-side pinion shaft nut is a critical fastener that bears substantial rotational forces in your primary drivetrain. A secure, properly-seated nut prevents gear slippage and drivetrain damage under load—especially important if you’ve upgraded to higher horsepower or frequent hard riding. This JIMS part is engineered to OEM specifications and rated for the demands of modern Harley-Davidson Softail performance.
- 5/8″-24 left-hand threads
- Precision-engineered construction
- OEM-specification compliance
- High-torque rated
- Durable materials
- Bolt-on installation
- Fits 1984-1989 FXSTC






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