Case hardenSquare head cup point set screws are threaded fasteners used to secure components (like gears or pulleys) onto shafts, featuring a square head for high-torque wrench tightening and a cup-shaped point that digs into the shaft for a secure, semi-permanent hold.
They are designed for easy, manual adjustment in high-load industrial machinery, older equipment, and railroad applications, often manufactured from alloy or stainless steel.
Thread = 13 TPI
