Detailed Product Description 1) Size: M5-M562) Items:Bolt3) Grade: 4.6 - 10.9, 304(A2-70),316(A4-80)4) Surface: Black, Zinc Plated, Yellow Zinc Plated,Dacroment...5) Packing: bulk, box packing, Carton, Pallet6) Standards:according to the customers' drawing or samples