The carriage bolts are 100% stainless steel 18-8 (304) which offers a high level of chemical and corrosion resistance.
These bolts can be used in high-stress applications, such as valves, pumps, motors, and automotive suspension systems.
304 stainless steel (A2) and no exterior finish, greater strength and corrosion resistance performance than regular stianless steel or zinc plated fasteners.