... .9 / 12.9 & Grade 2, 5 ,8, 10Diameter: According to drawings or StandardLength:According to drawings or StandardMaterial:Carbon steel, Stainless steel ,Copper, Alloy ... are manufactured according to DIN, ANSI, AS, BS, JIS, GB, ISO and other standard&non-standard specifications base on our customers’ special request ... need fasteners, contact us ” Special nuts and bolts / base on customers'drawing