A Duplex Steel Socket Set Screw is a threaded fastener that usually does not have a head.
Set Screw is basically a compression device normally used to generate axial thrust, unlike most other threaded fasteners. This screws also known as Grub Screws. Duplex-Steel Socket Set Screws are used to hold parts like sleeve, collar, coupling, gear and others on a shaft to prevent relative motion. A variety of socket types are provided to allow the set screw to be rotated. A few of the types include hexagon socket, screwdriver slot, fluted socket and square head.