Engineered Marine Products 12-02668 Brass Castle Washer

The Engineered Marine Products 12-02668 is a brass castle washer designed for securing propeller hardware on Mercury and Mercruiser marine engines. This precision-engineered locking washer provides a mechanical barrier to prevent propeller nuts from loosening during operation.

Key Features:

• Constructed from corrosion-resistant brass material for marine environments
• Castle design with notches that engage with locking mechanisms to prevent rotation
• Fits between the propeller nut and mating surface for secure fastening
• Designed for splined rubber hub propellers (non-Flo-Torq II applications)
• Tabs are bent around the nut after installation to lock the assembly in place

Application: Compatible with Mercury/Mariner 135-275 HP (V6 2-cycle) outboards, Alpha drives, and Bravo I drives without Flo-Torq II hubs. This washer replaces OEM part numbers 12-31211, 12-31211A2, 12-31211A3, 12-31211Q03, and cross-references with Sierra 18-3714, GLM 21360, and Mallory 9-73902.

Engineered Marine Products manufactures quality marine engine components using advanced technology and precision manufacturing processes, backed by over 40 years of industry experience.