... Roofing Screws;DIN7504K,SAE J78,ISO 15480, ISO 15481, ISO 15482, ISO 15483,Hex Washer Head ... Self Drilling and Tapping Roofing Screws;DIN7504K,SAE J78,ISO 15480, ... ,Modified Truss Head Self Drilling and Tapping Roofing Screws;DIN7504K,SAE J78,ISO 15480, ISO 15481, ... 15483,Countersunk Head Self drilling and Tapping Roofing Screws;DIN7504K,SAE J78,ISO 15480, ISO 15481, ...