Product introduction
                            
                            Roofing Screw  Hex Flange  With Rubber Washer Hex EPDM Washer Head  Self Drilling Screw 
Material: C1022/1022A
Head type: wafer, countersunk, pan, framing, bugle, combination
Surface Treatment: White/Yellow Zinc Plated. 
Thread: fine thread
Diameter: 4.2mm 4.8  5.5 6.3
Length: 9.5mm to 200mm
Point: TEK Drill point, Sharp point, 
Standard: DIN / ISO / GB