The 3/4 Internal Tooth Lockwasher from REX INTERNATIONAL is designed to provide superior locking capabilities for fasteners. Made from high-quality steel, this lockwasher features an internal tooth design that enhances grip and prevents loosening under vibration. With a diameter of 3/4 inches, it is ideal for various applications in automotive and industrial settings. This lockwasher meets ANSI standards for reliability and performance, ensuring a secure fit in your assembly. Perfect for use with bolts and screws, it is a must-have for any toolkit.