discount 70% in 2018-09-24 to 2018-09-26
price: USD$ 51.10
freight :USD$7.00,(Postal parcel)
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SPT is a straight thread (straight thread) pipe tap, which is used to process the parallel thread of taper pipe thread and parallel pipe thread.
PF is the British system of wire tapping, 55 degree tooth angle, Hui family screw thread, mainly for mechanical combination (parallel thread and parallel thread combination) with thread tapping.
NPS is the American pipe tapper, 60 degree belongs to the mechanical connection (non sealing) with a straight pipe thread, can free fit on the device.