1. Materials: Stainless, Aluminum, Carbon Steel,Brass, etc 2. Grades: 2, 5, 4.8, 8.8 3. Standards: DIN603 & IFI C-40 Specifications of Carriage Bolt:1.Standards & Sizes: StandardsSizesDIN603M6-M12IFI C-401/4-3/82.Materials of Carriage Bolts we can produce:Stainless, Aluminum, Carbon Steel,Brass,Alloy Steel,Nylon,Silicon,Bronze,etc.3.Grades:2,5, 4.8, 8.84.Surface Treatment of Carriage Bolts we can ...