This is a frontal mounting terminal screw instantaneous General Electric one normally open and one normally closed contact used with GE MC contactors.
NOTE: ABB announced it has completed its acquisition of GE Industrial Solutions (GEIS), GE’s global electrification solutions business on June 30, 2018. The GE range of contactors has now come to an end and other ABB products are available but please note that some parts are NOT directly compatible.