... drilling screws, chipboard screws, drywall screws, furniture screws, rivets, anchors and many other hardware products made of carbon steel, alloy & stainless ... zinc electroplating, phosphate, copper plating, mechanical galvanization, hot dip galvanization, and Dacromet. Our products are produced in conformity with DIN, ANSI ... about our company, you are welcomed to visit us. DIN933\DIN931 Hex bolts