Enhance the security of your fastening applications with this External Tooth Lock Washer. Designed for reliable grip, it features a specification type of ASME B18.21.1 and is crafted from durable 18-8 Stainless Steel. With an outside diameter of .252 inches and a thickness of .015 inches, it offers precise performance. The washer's internal diameter of .119 inches and hole size of #4 ensure a snug fit. Compliant with RoHS standards, it is a responsible choice for your projects. Trust in its quality to keep your assemblies securely fastened.