All hardware is stainless steel with nuts cast in place so they will stay in the zinc if unscrewed. Zincs should be replaced when they have been reduced to about one half their original size or weight. Inspect them carefully during your annual haul out and replace them accordingly. If your zincs need replacement more often than once a year it is a strong indicator that you have an electrical leakage problem that should be located and corrected. Our zincs are made with socket head cap bolts designed to be tightened with an Allen wrench, the correct tool for achieving the proper torque and making the zinc sufficiently tight.
Allen wrenches are easier to use underwater than slotted head fasteners.
Thin pencil zincs for engines are easily replaced with an adjustable wrench. All Rights Reserved.