... /2"~11") 3,Dia.:3.5mm~6.3mm(#6~#14) 4,Points:PT.1~PT.55,Surface finish:---a) White,yellow ... J78,ISO 15480, ISO 15481, ISO 15482, ISO 15483,Hex Washer Head Self Drilling and Tapping Roofing Screws;DIN7504K,SAE J78 ... J78,ISO 15480, ISO 15481, ISO 15482, ISO 15483,Concrete Screw;DIN7504K,SAE J78,ISO 15480, ISO 15481, ISO 15482, ISO ...