... Roofing ScrewsDIN7504K,SAE J78,ISO15480.ISO15481,ISO15482,ISO15483,Painted Head Self Drilling and Tapping Roofing ScrewsDIN7504K,SAE J78,ISO15480,ISO15481, ... ,SAE J78,ISO15480,ISO15481,ISO15482,ISO15483,Modified Truss head Self Drilling Roofing ScrewDIN7504K,SAE J78,ISO15480,ISO15481,ISO15482,ISO15483, ... J78,ISO15480.ISO15481,ISO15482,ISO15483,Others series. Nylon Head Self Drilling Screw