Feature: Self drilling screw 1>Standard: DIN7504 2>Head:Cross/Square Hole Pan head,Cross/Sunken/Half sunken head,Plum Blossom Nylon Head,Hex Nylon head,Cross/Square Hole Sunken head,Cross/Round head Washer,Wafter Head,Metal Head ,Hex Washer head 3>Finish: Zinc plated ,yellow zinc ,Flange,Darkrow, 4>Diameter: 3.5/4.2/4.8/5.5/6.3mm,6#,8#,10#12#14# 5>Length: 16-180mm. 6>Material: 1022 7>Packing:25kg/ctn or customed