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A corrosion resistant steel alloy. The most common stainless steel for general hardware use.
A tempered medium carbon steel. Zinc plated for moderate corrosion resistance. Grade 5 falls between grade 2 and grade 8 in strength, and is commonly found in automotive applications.
Grade 8 is stronger than grade 5, and is commonly found in high strength automotive applications. A tempered medium carbon steel. Zinc plated for moderate corrosion resistance.
Flange bolts have a flange on the bottom of the head that distributes the load like a washer.