Stainless steel is one of the most common materials used for fasteners due to its stability, strength and anti-corrosive and high heat properties. Its combination of the strength of steel with its superior anti-corrosion and heat-resistance properties result in a versatile, economic alloy. Stainless steel is available in three main grades – austentic (300 series), martensitic and duplex. The 300 series of stainless steel is the most common and is used for sanitary applications due to its ease of cleaning and corrosion-resistance. Martensitic stainless steel screws, bolts, nuts and studs are extremely strong and easily machined.