Qingdao Ruiyida Hardware limited company
Our product mainly are screws, bolts, nuts, flat washers, spring washers and other kinds of stainless steel and carbonic fastening piece. The products are produced in conformity with DIN, ANSI, ASME, JIS, ISO. materials to ensure that material 304. 316 200, 201, 202 and customized according to customer requirements!
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