XRmarine Prop Nut Tab Washer Kit for MerCruiser Sterndrive Alpha One Bravo 1 2 3 Drives 52707A1 18-3701 This kit includes tab washers designed to fit MerCruiser sterndrive models including Alpha One and Bravo 1, 2, and 3 drives. The components are compatible with part numbers 52707A1 and 18-3701. The tab washer is engineered to secure the propeller nut in place, helping maintain proper alignment and function of the drive system. This set supports standard maintenance and replacement procedures for marine propulsion units. Compatibility Disclaimer: This is an aftermarket replacement part. Any brand names or model designations mentioned are used solely for the purpose of demonstrating compatibility.