Hillman 1/2-in Stainless Steel Standard Flat Washer in the Flat Washers department at Lowes.com
Ceramic Washers - Advanced Ceramic Manufacturer
Ceramic Cut Washer
Hard-to-Find Fastener 014973171223 Specialty Nylon Washers, 0.250 x 1.250 x 0.062, Piece-10, Flat Washers - Amazon Canada
3/4 Component Thick Washer 0.781 ID 1.875 OD 0.250 Thk Steel Case Hard USA - AMPG - Shoulder Screws, Shoulder Bolts, Sex Bolts, Flat Washers, Machine Screws and other fasteners
Hillman 3/8-in Zinc-plated Standard Flat Washer in the Flat Washers department at Lowes.com