1)Standard:DIN,ASME/ANSI,BS 2)Material:Mild Steel,Carbon Steel,stainless steel,etc 3)Size:All sizes are available Feactures:1)Standard ... :DIN,ASME/ANSI,BS2)Material:Mild Steel,Carbon Steel,stainless steel,etc3)Size:All sizes are available4)Finish:Plain,Zinc ... pallet or according to customers' requirements Serrated lock washers external teeth