1/4-20 x 5/8 Inch Coarse Plain 316 (A4) Stainless Steel Cup Point Socket Head Set ScrewCup point set screws feature a hex drive at one end and a cup shaped indentation at the other. The most commonly used set screw head style, the thin edge of the cup end digs into the contact surface for high holding power. It is useful for fast permanent and semi permanent placement in applications where some indentation left by the cup end is acceptable.