1.Self drilling screws 2.Length:13mm-280mm 3.Dia:3.5mm-6.3mm ... ISO15483,Pan Framing Head Self Drilling and Tapping Roofing Screws;DIN7504K,SAE J78,ISO15480.ISO15481,ISO15482,ISO15483,Bugle Head Self Drilling and Tapping Roofing ... ScrewsDIN7504K,SAE J78,ISO15480,ISO15481,ISO15482,ISO15483,Pan Framing Head Self Drilling Roofing Screws;DIN7504K,SAE J78,ISO15480,ISO15481,ISO15482,ISO15483,Hex Flange ...