3/8 UNC NYLON INSERT NUTS ZINC

Imperial nyloc nuts are used in applications where vibration or movement could cause a standard nut to loosen, such as in automotive, DIY, and industrial settings. The nylon insert provides a self-locking function by creating friction against the bolt threads, which prevents loosening and can also help create a seal against fluids like oil and water. They are common in any situation where a secure, reliable fastening is crucial and the risk of a fastener coming undone due to vibration is high.