Enhance the durability of your fastening solutions with Allstar Performance 1/8 inch Back Up Washers. Crafted from high-quality aluminum, these washers are designed to provide added strength when fastening panels together or re-securing damaged panels. With an inner diameter of 0.125 inches and an outer diameter of 0.375 inches, these washers are the perfect choice for your automotive and construction tasks. Available in a bulk pack of 500 for comprehensive coverage.