"DESCRIPTION Features: British Standard Pipe (BSPF). Split circular chrome alloy button dies are most commonly used in conjunction with a die stock handle. They can be used as thread chasers to clean an existing thread. They can also be used to create a new male thread on non-ferrous metals and plastics. Chrome alloy dies are not suitable for creating precision, safety or critical threads. BSPF (G Series) is a pipe thread which is used mainly for mechanical coupling. The angle of thread is mainly 55º however for the US method some threads have a 60º angle. It is specified according to JIS and ISO R228. REVIEWS"