Free Running Insert

Free running insert is a spring-like internal and external thread concentric body precisely machined with high-strength, high-precision, smooth-surfaced cold-rolled diamond-shaped stainless steel wire. It is mainly used to strengthen and protect the internal thread of low-strength materials. The principle is to form an elastic connection between the screw and the thread in the base body, eliminating the thread manufacturing error and improving the joint strength. The wire screw insert is embedded in the threaded hole of low-strength engineering materials such as aluminum, magnesium alloy, cast iron, glass steel, plastic, etc. It can form high-precision internal thread conforming to international standards, with high joint strength, shock resistance, impact resistance and wear resistance. Function, and can disperse the stress to protect the base thread, greatly extending the service life of the base.