Check the listing for details. 2" ID USS Flat Washers - (Pack of 5). Condition: New. Listed at 17.70 USD. 2" ID USS flat washers. Made of steel with a zinc-clear coating. These USS flat washers are made of steel and have a zinc-clear finish that provides good corrosion and rust protection. USS washers have a larger ID and OD than their SAE washer counterparts. Our eBay Store 2" ID USS Flat Washers - (Pack of 5) Product Details 2" ID USS flat washers. Made of steel with a zinc-clear coating. These USS flat washers are made of steel and have a zinc-clear finish that provides good corrosion and rust protection. USS washers have a larger ID and OD than their SAE washer counterparts. Steel with a zinc-clear finish. 2" Nominal ID 4 1/2" outer diameter (OD) Thickness: 0.19'' WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov.