The drivetrain of an inboard vessel is subjected to immense torque and continuous under-the-waterline vibration. When you slide from forward to sudden reverse, the only thing keeping your high-value propeller from backing off the shaft taper is your fastening hardware. The Handi-Man Marine 1-1/8" Inboard Propeller Shaft Fastener Kit (MPN: 592044) is engineered to handle those high-stress shifts with total reliability.

This kit utilizes the classic, time-tested dual-nut friction locking system. It features a heavy pattern full-size shaft nut paired with a secondary thin jam nut. When wrenched tight against one another, they create a physical wedge lock that prevents the fastening assembly from spinning loose during high-RPM operation.

Every component is selected to maximize service life in punishing marine conditions. The heavy-duty nuts and radius-cut key are machined from premium solid brass to facilitate smooth thread engagement and prevent galvanic corrosion when paired with a stainless steel shaft. Finishing the kit is a corrosion-free 316 stainless steel cotter pin, ensuring total drive security season after season.

Key Features

• Dual-Nut Wedge Protection: Employs a primary full-size shaft nut and a thin jam nut that compress together to eliminate backing-off during aggressive reverse shifts.

• Corrosion-Proof Brass Hardware: Machined from high-quality solid marine brass to ensure rust resistance and prevent thread binding or galvanic lockup on stainless steel shafts.

• All-In-One Drive Refresh: A complete replacement bundle that includes both critical shaft nuts, the correctly sized radius-cut woodruff key, and a marine-grade cotter pin.

• Vibration-Resistant Seating: Tight thread tolerances keep the joint secure across long seasons of running gear vibration.

• Essential Emergency Spare: Packaged neatly as a critical emergency backup item—ideal to keep in your boat's onboard tool locker alongside your spare propeller.

Specifications