... J78,ISO 15480, ISO 15481, ISO 15482, ISO 15483,Bi-Metal Self Drilling and Tapping Roofing Screws;DIN7504K,SAE J78,ISO ... J78,ISO 15480, ISO 15481, ISO 15482, ISO 15483,Hex Washer Head Self Drilling and Tapping Roofing Screws;DIN7504K,SAE J78 ...