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. ; Specifications:Diameter1"Pitch11 tpiLeadBottomingOverall Length96 mmTapping Drill30.5 mm