The Split-Loc Propeller Nut is a patent-pending locking system designed to provide maximum security and reliability for high-performance marine propeller applications. Engineered specifically for Mercury V6, V8, and V10 performance outboards, as well as high-performance I/O applications equipped with a 19 or 23 spline hub, the Split-Loc system is built to withstand the extreme loads and vibration commonly experienced in performance boating.

Unlike traditional nylon lock nuts, the Split-Loc design mechanically locks the nut in place using an integrated internal locking mechanism. This helps prevent loosening during hard acceleration, deceleration, surfacing conditions, and high-vibration operation.

Manufactured from high-quality marine-grade materials, the Split-Loc Propeller Nut is engineered for durability, corrosion resistance, and repeated service use in harsh marine environments. The compact, precision-machined design allows for quick installation while maintaining a clean, high-performance appearance.

The Split-Loc system is designed to deliver superior holding power, increased reliability, and added confidence for serious boaters, racers, and high-performance enthusiasts.