Treaded Fastener Types 1.Screws 出 An external threaded fastener Generally assembled into a blind threaded (tapped)hole 出 The most common type of threaded fasteners screw 9 Introduction to Engineering9 Introduction to Engineering Treaded Fastener Types  An external threaded fastener  Generally assembled into a blind threaded (tapped) hole  The most common type of threaded fasteners screw 1.Screws