Features: BSPF (G SERIES) - British Standard Pipe BSPF (G Series); This series is a pipe thread which is used mainly for mechanical coupling. ; The angle of thread is mainly 55 however for the US method some threads have a 60 angle. It is specified according to JIS and ISO R228. ; BOTTOMING TAPS have a lead of two threads and are used to ensure minimum thread run-out when tapping to the bottom of a blind hole. ; Bottoming Taps are typically preceded by the use of a Taper or Intermediate Tap. ; INTERMEDIATE TAPS have a lead of four threads and are used in most general purpose applications to cut a thread true to a pre-drilled pilot hole. ; TAPER TAPS have a lead of eight threads and are used as a starting tap in difficult or high precision holes. ; Manufactured from HSS this general purpose tap is designed for use in medium tensile materials and is for hand or general machine use. ; Specifications:Diameter3/8"Pitch19 tpiLeadingBottomingOverall Length75 mmTapping Drill15.5 mm