Cup Point Grub Screw

Headless hex socket set screw with a cup-shaped tip that bites into the shaft surface for a firm, reliable grip. The most widely used grub screw type for securing pulleys, knobs, gears & collars onto rotating shafts without any protruding head.

Manufactured from high-quality alloy steel with black oxide or zinc plating, these screws deliver consistent clamping force and are suitable for both permanent and semi-permanent shaft locking applications across industrial machinery, motors, and drive systems.