A grade 316 nylon lock nut, also known as a nyloc nut, is a type of nut that combines the features of a standard nut with a nylon insert to create a self-locking mechanism. The 316 stainless steel material provides superior corrosion resistance, making it ideal for applications in harsh environments like marine or chemical settings. The nylon insert, typically a ring at the top of the nut, deforms elastically when tightened against a mating surface, creating friction that resists loosening due to vibration or other forces.