Detailed Product Description nail bolt 1)Size:M6-M30,in all length2)Standard:DIN,BS,ASTM,JIS3)Material:carbon steel4)G.r:4.6,4.8,6.8,8.8 5)Surface:plain,black,zinc plated,hot-galvanized6)Packing:bulk in carton with pallet,bulk in bags with palletWe also can do for our customers requestment. Dear partner,contact me soon,we believe common interests will enable us to have first cooperation.