Standard: GB/T6170-6176,ISO4032-4036,8673-8675,DIN934,

　　ASMEB18.2.2,JISB1181,AS1112, ASTMA194/194M

　　Grade: 4, 6, 8, 10, 12

　　Size: M6-M100

　　Surface Treatment: Plain, Black,Galvanized with Zinc, HDG

　　Material: Carbon Steel, Mild Steel,Stainless Steel

　　Packing: 25KG Per Carton, 50KG Per Gunny Bag, Pallet or according to customers’ requirements