AUTOMOTIVE PARTS › AAUSA Wilwood Washer .477in IDx .922 OD x.063 Carbon Steel AAUSA Wilwood Washer .477in IDx .922 OD x.063 Carbon Steel $0.99 Wilwood’s Washers are manufactured from high strength alloy steel or stainless steel and plated with an anti-corrosion finish or treatments. Add To Cart Added! Wilwood’s Washers are manufactured from high strength alloy steel or stainless steel and plated with an anti-corrosion finish or treatments.