1) High-precision,professional manufacturing 2) ACME,DIN, JIS,BSW, GB 3) ISO9001:2008, ... 4) low price/high quality Standard ACME,JIS,DIN,BSW,GB etc.(including non-standard) Diameter 2mm ... tool, spinning, medical equipment, exercises machines, car and other industry. pls enquiry us. Quality Professional manufacturing, ... your drawings for better quotation and other details. trapezoidal lead screw and Nuts