The CUP-POINT SOCKET SET-SCREW 1/4"-20 x 3/8" is a headless screw featuring a hex drive for easy installation and a cup-shaped indentation that provides optimal grip. This highly utilized style set screw offers a Rockwell hardness of C45-53, ensuring durability and strength in demanding environments. With a diameter of 1/4" and a length of 3/8", it is ideal for securing components in machinery, automotive, and industrial applications.