The CUP-POINT SOCKET SET-SCREW 1/4"-20 X 5/16" features a headless design threaded along its entire length, making it ideal for applications requiring a flush finish. It has a hex drive for easy installation and a cup-shaped indentation at the tip to enhance grip on the mating surface. With a Rockwell hardness of C45-53, this set screw offers excellent strength and durability. Its dimensions are 1/4-20" in diameter and 5/16" in length, making it suitable for a variety of automotive and industrial uses.