self tapping screw 1Head:Hex csk and pan head. 2 Diameter:#4-#6 3 length:11-200mm 4.finished:zinc ,

Hex washer head self drilling roofing screw1Head:Hex csk and pan head.2 Diameter:#4-#63 length:11-200mm4.finished:zinc , phosphate.

5material:steel ,stainless steel ,

self tapping screw