... to the famous Qingdao port 2 all kinds of material 3 most competative price 4 produce to your request bolts and ... : 4.8,6.8,8.8,10.9,A2,A4 3) STD: JIS, BS, DIN, AISI....Description:hardware bolts and nutsScrews ... , Class 10.9, Class 12.9SurfaceBlack, White or Blueness Zinc (Cr.3 or Cr.6), Yellow Zinc, Dacromet, Hot Dip Galv, Nickel Plating ...