Hubbell Washer Square Curved Cast Ductile Iron Chance 1/2" x 3" x 3" GCW31 284Q. If buying multiples of these I can adjust the shipping down to flat rate box for you. This Hubbell Washer Square Curved Cast Ductile Iron Chance 1/2" 3" x 3" is a top-quality hardware washer designed to ensure your fasteners and hardware are secure and durable. Made from high-quality galvanized steel, this washer is built to last and withstand tough conditions. With a brand name like Hubble-Chance, you can trust that this square curved washer is a reliable choice for your business and industrial needs. Its inch system of measurement makes it easy to use and use with other hardware components. The hole size of 1/2" and item diameter of 3" ensure a perfect fit for your fasteners, making it a great addition to your hardware washers collection.