This NTM/NTE UNF self-locking hex nut features a built-in nylon insert that acts as an integrated locking mechanism, minimizing the risk of loosening from vibration or mechanical stress. Manufactured to ASME B18.16.6 standards, the nut is made from Grade N2 steel and features Unified National Fine (UNF) threading. Its electro-zinc-plated finish makes it well-suited for indoor applications or environments with minimal exposure to the elements.