thread bars din975 name:thread bars standard:din975 surface:zinc plated , black , plain , H.G.D ... , we provide black oxide, zinc electroplating, phosphate, copper plating, mechanical galvanization, hot dip galvanization, and Dacromet. Our products are produced ... with DIN, ANSI, AS, BS, JIS, GB and ISO standards, non-standard specifications or upon our customers' special requirements, in grades 4 ...