The CUP-POINT SOCKET SET-SCREW #8-32 x 5/16" is designed as a headless screw featuring a hex drive for easy installation. Its cup-shaped indentation provides excellent grip, making it the most commonly used style of set screw for a variety of applications. With a Rockwell hardness of C45-53, this durable screw ensures reliable performance and longevity. Perfect for securing components in machinery and equipment where space is limited.