Grade 5 hex king bolt Surface :Zn yellow Machined and turned SGS audited More than 20 years experience in fastener field 1,Name: Grade 5 hex king ... ,4.8,5.6,6.8,8.8,9.8,10.9,12.9,etcCarbon steelGr.B,Gr.C,Gr.D,Gr.36,Gr.58 ... ,6063,etc(2),Ability for the surface finish: ElectroplateZinc plated(while,colour,dacroment),Nickel plated,copper plated,gold plated,chrome(3+Rohs &6+ ) plated,anodic oxidation ...