Marson, SS-9-500, Back-Up Washers (Marson), Unit of Measure: Inch, 0.160 Inch Inner Diameter, 0.437 Inch Outer Diameter, Material: Steel, Finish: Zinc Clear, Overall Thickness: 0.060 Inch, Bolt Size: 5/32 Inch, ECCN: EAR99, HTS Code: 7616.10.3000, RoHS 3 Compliant: Yes, Shape: Round