Sq Washer for M22 Bolt 28 ID 50 Wd 6 Thk, Dimensional Standards AMPG 2017 SQ.01, Material Stainless Steel, Material Grade/Class 18-8, Finish Plain, For Screw Size M22, Inside Diameter 28 mm, Outside Diameter Not Applicable, Maximum Thickness 6 mm, System of Measurement Metric, Minimum Thickness 6 mm, Made in North America Made in North America, Material Quality Standards ASTM A582, Resistance Properties Chemical-Resistant, Corrosion-Resistant, Dye-Resistant, Food-Resistant, Nitric Acid-Resistant