The T-series Spiral Taps and T-series Spiral Pointed Taps
are unique in feature having cutting edge and a sliding edge．Since
TAFLET relief is provided on a teeth of complete thread following
to the chamfer part，the thrust power of taps are adjusted
and internal threads are not enlarged even if the work material
is soft steel．(Not-go gauge IP ∏stops within 1 thread．)
管用螺纹的组合和新旧记号的对应表 Table for combination of pipe threads and new symbols correspond
to former symbols
