Bolts & Set Screws

Set screws or setscrews refer to a bolt which is fully threaded, with no smooth shank. These commonly have a hex head, but are also found with socket or screw heads.

Set Screws are usually fully inserted into the connecting object

Bolts have a portion of the shank that is not threaded which varies in length. Bolts are usually used to secure things in place with the use of a threaded nut and often washers.