... OEM from China; Certification:ISO14001 ISO9001 SGS Specifications Colored metal flat washersProcess Capablilities Standard ISO, GB, DIN, JIS, ANSI, BSW, ... equipment from Taiwan area, and mainly produces forged fastener precise screws, which are made of titanium, copper, aluminum, iron, stainless ... future business relationships and achieving mutual success! certificate Colored metal flat washers