... control:100% inspection DIN968 Round Philips Serrated Head Tapping Screws with collar 1.Material: Iron,stainless steel,copper and etc.. ... ,JIS ISO ,BS,ANSI...ETC3.Surface Finish: zinc plated(white, black, blue, colour), nickel plated, chromated, passivate, phosphated, plain finsh and etc ... quality and competitive price. Please don't hesitate to contact with me if you are intersted in our products, and ...