Tools & Gear Taps & Dies Chrome Alloy Taps

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 deg; however for the US method some threads have a 60 deg; angle. It is specified according to JIS and ISO R228. 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.