Grip Rite Prime Guard 1222HGSQW Grip Rite Hot Dipped Galvanized Square Washer 2-inch by 2-inch 50 Per Pack 2-inch by 2-inch 50 Per Pack For Attaching Bottom Plate or Sill Plate to Newly Poured Concrete Foundation Recommended for Treated Lumber Meets ASTM A307 and ASTM A153 Class C Standards