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