M6-1.0*3DHelical Inserts 304 Stainless Steel DIN8140 (5000pcs/Pkg) Weight-Pound:14.3 Countersunk serrated lock washers feature

Countersunk serrated lock washers feature a unique design that provides a secure grip and prevents loosening under vibration

or cap nuts

while the nylon insert grips the threads of the bolt

Acorn nuts

Hex nuts are essential fasteners used across various industries

M6-1.0*3DHelical Inserts 304 Stainless Steel DIN8140 (5000pcs/Pkg) Weight-Pound:14.3 Countersunk serrated lock washers featureNylon insert lock nuts are designed with a nylon insert that grips the threads of the bolt, preventing loosening due to vibration. This feature makes them ideal for applications requiring a secure, reliable connection. They are commonly used in various industries, including automotive and machinery, to enhance stability.