Engineered Marine Products 12-02668 Brass Castle Washer

The Engineered Marine Products 12-02668 is a precision-crafted brass castle washer designed for marine propeller installations. This mechanical locking device uses a physical barrier to secure bolted joints and prevent propeller hardware from loosening during operation.

Key Features:

• Constructed from corrosion-resistant brass material for marine durability
• Castle design with notches that engage with locking mechanisms to prevent rotation
• Fits between the bolt head or nut and mating surface on propeller assemblies
• Compatible with Mercury/Mariner outboard motors and MerCruiser stern drives
• Essential component for maintaining proper propeller retention

The castle washer's notched design allows the tab portion to be bent around the fastener head after installation, creating a positive lock that prevents the hardware from backing off due to vibration and torque loads. This washer is commonly used with rubber hub propellers on 15-spline propeller shafts.

Replaces OEM Numbers: Mercury 12-31211, 12-31211A2, 12-31211A3, 12-31211Q03, Sierra 18-3714