... quotation; 3.Good quality and service; Specifications Standar Helical spring Washer Process Capablilities Standard ISO, GB, DIN, JIS, ANSI, ... Ltd. is a manufacturer of screws with well-equipped testing equipment and strong technical force. With a wide range, good quality, ... equipment from Taiwan area, and mainly produces forged fastener precise screws, which are made of titanium, copper, aluminum, iron ...