Replacement hex head screw (1/4"-20 x 3/8") used for mounting the retaining cup for the top and bottom auger bearing on IronStrike Winslow PS40 and PI40 pellet stoves.Each bearing assembly consists of 1 cup,1 bearing, and 4 screws. These screws are meant to replace the 1/2" screws which fasten from the sides. They allow the cup to be mounted to the hopper WITHOUT touching the actual bearing, which can prevent it from spinning.