Shind SD-31285 Fastener  (Internal Placement)

Insert Lock Nuts are designed to provide a secure locking mechanism for small fasteners. With a 4mm internal diameter, these lock nuts are used to prevent loosening due to vibration or movement. The insert, usually made from a nylon material, creates friction against the screw threads, which helps maintain a tight connection. These nuts are commonly used in various mechanical and electronic applications where a secure and reliable fastener is essential.