The coating... ... more $17.27 go to store at Amazon.com Sort: Best Match Price Low-High Price High-Low Product Rating Show: Free Shipping Sales Tax & Shipping: Alloy Steel Set Screw, Plain Finish, Hex Socket Drive, Dog Point, Meets ASME B18.3/ASTM F912, 1/4 Length, #10-24 Threads (Pack of 100) Set screws are often used for holding a pulley, gear, or other parts from turning relative to a shaft.