All kinds SEMS screws supply Material:carbon steel,stainless steel,brass Plating: Zinc,Nickle, ... Type:Pan,Truss,Cheese,C.S.K,Oval,Hexagon,Hexagon washer,Pan washer,Flange,Square,T head,etc.3.Drive of screw ... packing: 15-18Kg per Carbon, 60 Carbons for a Pallet. SEMS screws