self tapping screw 6x70: 1) Materials: carbon steel, stainless steel 2) Size: ... 's up to the client 3) Color:zinc plated,plain self tapping screw 6x70:1)Material:carbon steel,iron2)Size:It's ... )Color:zinc,black,plain,black phosphated4)Head type:flat head,pan head,bugle head,truss head,hexagon head5)Recess:philips,slotted,cambo,square,six-lobe,pozi ...