A Lock Nut is a type of nut designed to prevent loosening due to vibration or torque. It features an additional mechanism, such as a nylon insert, a deformed thread, or a serrated surface, that helps it grip the bolt or threaded component securely. Lock nuts are often used in applications where high levels of vibration are present, such as in automotive, machinery, and industrial equipment. ... There are several types of lock nuts, including nylon insert lock nuts, all-metal lock nuts, and serrated flange nuts, each providing a different method of locking. Made from materials like stainless steel, carbon steel, or alloy steel, lock nuts offer durability, corrosion resistance, and enhanced security for fastening.