Stainless Steel 9/16" inner diameter (ID) 1 5/32" outer diameter (OD) Thickness: 0.05''

9/16" ID 18-8 stainless steel USS flat washers. These USS flat washers are made of 18-8 stainless steel for excellent corrosion resistance and rust protection. USS washers have a larger ID and OD than their SAE washer counterparts.