Material:stainless steel,steel,brass,etc screw manufacturer screw slot form:Phillips, Phil-Slot,LR,LHS ... screw,micro screw,pan washer head screw,screw with washer,precision screw with shoulder,hard disk screw, self-tapping screw, coating screw, water-proof sealing screw, head coating screw, special use screw ... size, produce as your requirement is okFigure of screw headP/T/B/F/V/WHP/LH,etc.Figure ...