... & Sizes: StandardsSizesDIN603M6-M12IFI C-401/4-3/82.Materials of Carriage Bolts we can produce:Stainless, Aluminum, Carbon Steel,Brass,Alloy Steel ... Grades:2,5, 4.8, 8.84.Surface Treatment of Carriage Bolts we can provide:Yellow zinc plated, White zinc plated, Hot ... dip galvanized, Nickel plated, Polished, etc. 5.Carriage Bolts are used for: Pieces of timber are often secured together ...