Detailed Product Description 1) Name: bolts 2) Size: M3-M56 3) Material: Carbon steel, stainless steel, brass 4) Grade: 4.6 - 10.9, 304(A2-70), 316(A4-80) 5) Surface: Blank, black oxidized, zinc plated, HDG, DACROMETR, TEFLON6) Packing: bulk, box packing, Carton, Pallet 7) Standards: according to the customers' drawing or samples