Tri-Star Industries provides a range of threaded inserts for plastics, with several specialties within our brass inserts line including heat set threaded inserts and knurled threaded inserts. We also offer stainless steel threaded inserts for plastics.
Heat Set Threaded Inserts
We offer a full range of threaded inserts designed for ultrasonic or heat installation into thermoplastics or structural foam materials. Installed into tapered or straight plastic molded holes, heat set threaded inserts offer high-performance strength values along with cost-effective advantages. Lead-in pilot diameter at the front end of the inserts accurately positions the insert prior to installation ensuring on-center thread alignment. Our products are offered in two different lengths, providing superior assembly strength. Materials for our heat set threaded inserts typically include 360 Brass, which are electrically conductive, nonmagnetic and have good corrosion resistance properties. Alternative materials such as Aluminum “lighter in weight” and 303 Stainless offer lead-free and corrosive resistance advantages also.
Knurled Threaded Inserts
Tri-Star provides knurled threaded inserts designed for ultrasonic, heat or press-in installations into thermoplastic and structural foam materials. The outer body knurl designs provide excellent torque resistance and the undercut channels deliver optimum pull-out strength. The plastic area surrounding molded hole softens when heated during insert installation, then cools to re-solidify which provides a tight grip around the insert’s knurls and undercuts sections to ensure strong torque and pull-out resistance. Offered in a broad range of both Metric and Imperial thread sizes, our knurled threaded inserts are available in 2-3 different lengths.
Stainless Steel Threaded Inserts for Plastics
Tri-Star Industries now produces and stocks stainless steel threaded threaded inserts for plastics in a variety of styles and sizes. These inserts are manufactured from Stainless Alloy 303 and passivated per QQ-P-35 for extra corrosion resistance. Stainless Steel inserts are an alternative to other materials that require expensive, secondary plating operation that insured a corrosion resistant barrier is present in a highly corrosive and sanitary environment such as food and beverage industries, medical and marine to integrated circuit manufacturers. Also, stainless steel threaded inserts for plastics offer a lead-free alternative.