OMC Anode - 18-3722 OMC Anode - 18-3722 by Sierra. Please use the Red PARTS CHARTS button (top of any page) to locate the correct part for your application. $ 1.94               More Information      Quantity:     Stainless Steel Locknut - 18-3722 Stainless Steel Locknut - 18-3722. Please use the Red PARTS CHARTS button (top of any page) to locate the correct part for your application. All prices are per unit (50' Coil=50 Units, 2 PK=2 Units, and etc.). Verify your quantity is correct at Checkut and adjust as necessary. Send us an email (Contact Us button at top of any page) if you have any questions. $ 1.94               More Information      Quantity: