Key locking inserts are mainly used in products that require high thread strength, such as military industry, aerospace, automotive industry, etc., with wear resistance, high temperature resistance, and corrosion resistance, making it easier to use and prolonging its service life.
Key locking insert is a special fastener with internal and external threads, and there are 2 or 4 pin keys on the external thread. Key locking insert inserted into the bottom hole after tapping, and then 2 or 4 pins are pressed into the , play a strong fastening role.
Key locking insert's classification as following :
1. Key locking insert can be divided into two types: ordinary type and locking type in terms of bolt locking function.
2. There are two types of internal thread for bolt inserts: metric and imperial.
3. From the size of the external thread, the key locking insert can be divided into thin-walled, heavy-duty, extra-heavy, etc., as well as imperial miniature, solid body, etc., as well as imperial internal threads, metric external threads, metric internal threads, imperial external threads, etc. .

