TAPTITE screws were the leap forward in high production assembly using threaded fasteners. screws represent the refinement of the TRILOBULARâ¢ principle for specific demanding applications. TAPTITE screws have generous lobulation at the screw point for easy entry and optimum thread forming action plus reduced lobulation in the screw body holding area. A stabilizing threaded dog point insures ready, aligned entry, with easy pick-up requiring minimal starting end load. TAPTITE screws & bolts are available in inch and metric sizes, with head style to suit .