This NM/NE UNF self-locking hex nut is manufactured to ASME B18.16.6 standards and features a built-in nylon insert that helps prevent loosening caused by vibration or mechanical stress. Made from Grade N2 steel with a Unified National Fine (UNF) thread, the nut delivers reliable holding power. Its electro-zinc-plated finish makes it well suited for indoor applications or environments with minimal exposure to the elements.