Specifications 1) Best Quality 2) Manufacturer supplier 3) Reasonable price 4) Available in all sizes and standard 5) Fast Delivery Standard: GB897 898 900 901, ANSI C-6, DIN938 939 835 and others you want Grade 4.8, 8.8, 10.9, and others you need Material: 45#, 40Cr, 35CrMoA, 42CrMoA, 25Cr2MoVA, 35VB, 40CrNiMo, Stainless steel and so on Size M8-M56 Length: 12-1000mm Surface treatment: Black Oxide, Zinc plated, hot dip galvanized, and according to your requirement Others We can make the products accroding to your drawing or your sample