bolts nuts 1.Material:A3,Carbon Steel, Stainless steel, Alloy Steel 2.Diameter:M2-M24 3.Grade:4.8, 8, 10, etc din bolts nuts professional manufacturer Standard: DIN, ANSI, GB and non-standard. Thread: coarse, fine or extra fine. Surface: zinc plated, black, plain. Packing: Carton/pallet or according to customer`s requirement. din bolts nuts professional manufacturer