1).Materials of Carriage Bolts we can produce: Stainless, Aluminum, Carbon Steel, Brass, Alloy Steel, Nylon, Silicon, Bronze, etc.
2).Grades:2,5, 4.8, 8.8
3).Surface Treatment of Carriage Bolts we can provide: Yellow zinc plated,      White zinc    plated, Hot dip galvanized, Nickel plated, Polished, etc.