No.10 External Tooth Washer (ASME B18.21.1) - A2 Stainless Steel External Tooth Washers feature multiple angular blades which rotate in one direction, these are made to reduce any loosening after installation. These are often manufactured with high precision machinery. These External Toth Washers are made from A2 Stainless Steel which provides corrosion and oxidation resistance. For larger quantities or items not listed, please email and one of our team will provide you with a quotation. No.10 External Tooth Washer (ASME B18.21.1) - A2 Stainless Steel