Threaded Inserts for Plastics

Download our Threaded Inserts Catalog for information on brass inserts for plastics, blind threaded inserts and more.Below you will find information on Tri-Star’s threaded inserts for plastics. We offer a full line of brass inserts for plastics including options for all methods of installation including: ultrasonic, heat, thermal, press-in and mold-in. Tri-Star can also custom design and produce inserts for most applications with a low minimum order quantity requirement.

Although our standard line is brass inserts, we also stock stainless steel threaded inserts for plastics in a variety of styles and sizes. Our threaded inserts start at 0-80 for inch threads and M1.6 for metric threads. We offer the most extensive variety of lengths for ultrasonic and thermal threaded inserts in the industry.

Remember, if you don’t see what you’re looking for listed here, call our Engineering Department at 1-800-882-8980 and ask to speak with a Design Engineer.

Please note: Tri-Star requires a 1,000 piece minimum order. The minimum order value for new accounts is $250.00, and $125.00 for established accounts.

H Series: Tapered Threaded Inserts for Plastics: Brass Insert

H Series Tapered Threaded Inserts

The leading insert for ultrasonic or thermal installation into thermoplastic or structural foam. A row of unique “knuckle knurls” reduces residual stress and increases strength. The tapered design reduces installation time, making alignment faster and more accurate.

C Series: Chevron Threaded Insert for Plastic

C Series Chevron Threaded Inserts

Designed for straight holes using ultrasonic or thermal processes. This series features two opposing bands of sharp diagonal knurls of different diameters for maximum gripping power. A lead-in pilot diameter assures true perpendicular alignment.

HC Series: Headed Chevron Insert, brass inserts for plastics

HC Series Headed Chevron Inserts

The HC Series features a flange for a greater load-bearing surface in weaker plastics. The flange provides a large contact area for electrical connections. Used in reverse-entry applications, the HC Series offers exceptional pull-out strengths.

S Series: Symmetrical Threaded Inserts for Plastics

S Series Symmetrical Threaded Inserts

For fast, high-volume applications, symmetrical inserts install without orientation using ultrasonic or thermal equipment. They are designed for straight holes and are ideal for thin-wall applications because little stress is applied to the walls of the part.

P & HP Series: Threaded Press-In Inserts for Plastics

P & HP Series Threaded Press-In Inserts

Straight-hole inserts install easily in hard or thermoset plastics without heat or special equipment. Three bands of helical knurls anchor the insert firmly into place and provide excellent torque-out resistance.

MB Series: Mold-In Blind Threaded Inserts for Plastics

MB Series Mold-In Blind Threaded Inserts

Designed for mold-in applications. The inserts feature a blind thread (closed bottom) that prevents plastic from entering the bottom of the insert.

MC Series: Mold-In Closed-End Inserts

MC Series Mold-In Closed-End Inserts

Designed to be molded into Plastics, Rubber & Ceramics, with aggressive diamond knurling that provides high resistance to tensile pull and rotational torque loads. It has a closed bottom and a controlled minor diameter which provides for accurate positioning on core pins. The “closed-end” bottom prevents plastic flow into the threads.

MT Series: Mold-In Thru-Thread Inserts for Plastics

MT Series Mold-In Thru-Thread Inserts

Designed to be molded into Plastics, Rubber & Ceramics, with aggressive diamond knurling that provides high resistance to tensile pull and rotational torque loads. It also has a controlled minor diameter which provides for accurate positioning on core pins.

SH & SC Series: Threaded Studs

SH & SC Series Threaded Studs

Available in H or C Series body designs. Studs are commonly used to fulfill specific design functions, to save money in production costs, to function as electrical contacts or to replace self-tapping or removable screws. Thread lengths are variable to meet your specific requirements. Special studs without threads can be used as axles, pivots, pins, locating points or solder terminals.

CL Series: Compression Limiter

Compression Limiters

Unthreaded spacers (bushings) used to strengthen plastics during compression loads. These types of loads are generated when fastening bolts and screws during assembly. Compression limiters can be designed for any installation method.

Specials & Custom Threaded Inserts for Plastics

Specials & Custom Designed Parts

Our Design Engineers will be happy to adapt an existing insert or create a custom design specifically for your application. And you’ll be surprised how quickly we get back to you. Get in touch with us for custom threaded inserts for plastics, brass inserts for plastics, blind threaded inserts, threaded studs, and more.

CNC Machined Component

CNC Swiss Precision Machined Components

Our CNC Swiss machining capabilities are ideal for manufacturing parts with complex designs, tight tolerances, unique features and high quality surface finishes.

Helpful Information on Threaded Inserts for Plastics

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.

For more information, view our product catalog or contact us to speak with a specialist.