Bolts/Nuts

- Carbon steel (spp) is an iron-carbon alloy with a content of 0.0218 to 2.11%. Also known as carbon steel. It typically contains small amounts of silicon, manganese, sulfur and India. Generally, the higher the carbon content of carbon steel, the higher the hardness and the higher the strength, but the lower the plasticity.

- Stainless Steel is a steel with a minimum chromium content of 10.5% and a carbon content of no more than 1.2%, with rust and corrosion resistance as defined by GB/T20878-2007. Generally, the hardness of stainless steel is higher than that of aluminum alloys, and the cost of stainless steel is higher than that of aluminum alloys