Hawse Fairlead 1 Inch Thick Gun Metal Gray Factor 55Factor 55 introduces a new line of Aluminum Hawse Fairleads. The 1. 0 fairleads are CNC machined from 1 inch thick USA 6000 series aluminum bar. The industry standard fairlead thickness is . 75 inches thick. The thicker aluminum bar results in a larger outer fillet radius for the synthetic rope to slide against. This results in less stress on the rope fibers during high angular pulls, increasing the life of your synthetic rope. The 1. 0 and 1. 5