TE Connectivity HOLTITE® Series Discrete Sockets. HOLTITE® Series discrete socket contacts with a solderless zero profile for inserting into plated thru-holes on a PCB board enabling the holes to become the component socket. These HOLTITE® discrete socket contacts are conical in shape and re-size the thru-hole on the board when pressed into place. For dimensions and plating options please see additional data table. Stock numbers ; 718-5189 718-5189 and ; 745-5044 745-5044 are discrete sockets in a mylar film carrier with a 2.54mm centre line and 7.62mm row to row spacing.