The types of our thread rolling dies and thread include Metric (M), BSW (Whitworth), BS , PT , PS , UNC , UNF , NPT , NPS , trapezoid thread (GB) , TM (M) , raised R-shape , Concave R-shape , forming , ACME , sewing machine (SM) , bicycle (BC)... . In addition, any request of special specification, thread shape, pitch and teeth is welcome.