Socket Set Screws, also known as Allen Grub Screws, are headless fasteners designed to be inserted into a threaded hole to secure objects such as pulleys or gears to a shaft. These screws are tightened using an internal hexagonal (Allen) drive, providing a flush finish. Set screws are commonly used in mechanical and robotic applications where a secure, invisible connection is needed.

With their ability to hold components tightly in place without protruding, socket set screws are essential for clean and compact assemblies. For precision mechanical systems, using these screws ensures that moving parts remain securely attached without obstruction.