Crafted from durable galvanized steel, these 5/16-inch flat washers provide superior corrosion resistance, making them ideal for both indoor and outdoor projects. Their sturdy construction ensures a secure fit and optimal load distribution, reducing wear and tear on your fasteners. Whether you're assembling furniture or tackling a large construction job, these washers deliver reliable performance and longevity in every application, and the 100-pack ensures you have ample supply for all your needs.