This NM/NE self-locking hex nut (ASME B18.16.6) features a nylon insert that enhances its locking performance. This built-in mechanism significantly reduces the risk of the nut backing off due to vibration or mechanical stress. Made from Grade N5 steel with UNC (Unified National Coarse) threads, the nut comes with an electroplated zinc finish, making it ideal for indoor applications or environments with very mild exposure conditions.