DIN 6900-4
Product Feature :
Screw with curved serrated lock washer ( DIN 6907 ). SEMS Screws.
Head Type : DIN 7985 , DIN 933 , DIN 912 , Pan Head, Ind Hex Head, Hex Head , Ind Hex Washer Head, Truss Head, Fillister Head, Binding Head, Hex Socket Head … etc.
New styles and customized design are welcome!