ZFE 1Pc 1/16"-27 NPT Taper HSS Pipe Tap Machine Thread Tap ZFE 1Pc 1/16"-27 NPT Taper HSS Pipe Tap Machine Thread Tap High-speed steel for compatibility with a variety of materials Hand threading tap with straight flutes cuts threads in through holes and blind holes Round shank with square end allows tap to be used in hand or power-driven applications Uncoated (bright) tools have no additional surface treatment or coating