Metric flat washers

Material

• Stainless steel 18-8 (A-2)

  Also known as A-2 stainless, 18-8 is the most common grade of stainless steel for general use.

• Stainless steel 316 (A-4)

  Also known as A-4 stainless, 316 is a highly corrosion resistant grade of stainless steel. Ideal in salt water and chlorine environments. More expensive than 18-8.

• Zinc plated steel

  A low carbon steel for general use. Zinc plated for moderate corrosion resistance.

• 
  Zinc plated class 10.9 steel

  A tempered medium carbon steel. Class 10.9 is stronger than class 8.8, and is commonly found in high strength automotive applications. Class 10.9 is similar to grade 8. Zinc plated for moderate corrosion resistance.

• Chrome plated steel

  A low carbon steel for general use. Chrome plated and polished for a mirror like finish.

• Nylon 6/6

  A general purpose nylon often used in fasteners for corrosion resistance.