Washers for Installation of Foam Board Panels 1-1/4 Inch Galvanized Steel Washer for Fixing Fastening Installation (300 Pcs) : Amazon.ca: Tools & Home Improvement
Hot Dip Galvanized USS Flat Washers
Square Washers Hot Dip Galvanized Steel Square Plate Washers - Sizes 1/2" To 1" | eBay
Hot Dipped Galvanized Flat Washers Multiple Sizes in 5 lb lots - Great Value Buy | eBay
USS Flat Washers Galvanized (HDG) - BC Fasteners & Tools
Schluter KERDI-BOARD-ZS/-ZT Screws and Washers - Galvanized Steel 1-5/8" (Pack of 40) (KBZS35GT32Z) | FloorBox