The CUP-POINT SOCKET SET-SCREW 5/16"-18 x 3/8" features a headless design threaded along its entire length, providing a strong, secure hold. With a hex drive on one end and a cup-shaped indentation on the other, this set screw is ideal for applications requiring precise adjustment and stability. Made from durable material with a Rockwell hardness of C45-53, it is the most commonly used style for set screws. This versatile component is perfect for various industrial and automotive fastening needs.