Tri-Star Industries, Inc. maintains an Approved Vendor List for the services noted. Additionally, Vendors are subject to periodic audits by authorized Tri-Star personnel. Plating Heat Treating Grinding Secondary Operations Testing Inserts are used to strengthen plastic parts in which screws are to be installed and removed more than once. Most are made of brass, which provides long thread life as well as a solid, secure fastening base. Ours are also available in aluminum, stainless steel and free-machining steel.
Thermoplastics are like wax.
At usable temperatures they are solid, but at elevated temperatures they get soft and melt. Thermoplastic compounds are generally more resilient than thermosets and respond well to the ultrasonic or thermal installation of inserts. Thermoset compounds, however, are often brittle and less resilient than thermoplastics. They respond better to molding or post-molding cold insertion. Our inserts come in a variety of styles and sizes to meet a variety of applications.