Established in 2013, Aoying is a professional manufacture of precision screw which is fully certified facility with ISO 9001:2015 and comply with international standard – ASTM,ANSI, AISI, DIN, ISO, IFI, JIS. We are capable of producing and custom making standard screw, standard metal accessories and tailor-made screws in wide range of materials: low-carbon steel, medium carbon steel, alloy steel, stainless steel, copper, aluminum and titanium.