#8-32 x 1/8 Inch Coarse Black Oxide Alloy Steel Cup Point Socket Head Set Screw Best Seller They have a round cap

They have a round cap with a hex head and are tightened with a socket wrench drive

M8 Screw Grommet

Black oxide coating will slightly increase friction and holding power in some applications

Maintain Reliable Connections with this 7-Way Plug & Socket Brush for trailer connections

#8-32 x 1/8 Inch Coarse Black Oxide Alloy Steel Cup Point Socket Head Set Screw Best Seller They have a round capCup 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.