... preferential price 3,Prompt delivery, and transportation safet 1,Standard:EN ISO 15480 (DIN7504);2,Length:13mm~280mm(1/ ... 15480, ISO 15481, ISO 15482, ISO 15483,Countersunk Head Self drilling and Tapping Roofing Screws;DIN7504K,SAE J78,ISO 15480, ISO 15481 ... 15483,Nylon Head Self Drilling and Tapping Roofing Screws;DIN7504K,SAE J78,ISO 15480, ISO 15481, ISO 15482, ISO 15483,Concrete Screw;DIN7504K, ...