Threaded Inserts

Threaded inserts are inserted into plastic components to add strength to screw connections. Many threaded inserts are produced from brass, which creates a secure base for fastening inserted screws and allows for a longer thread life; however, they can be produced using various materials. These components are often found in thermoplastic and thermoset plastic assemblies to add necessary reinforcement to connecting fasteners.


Stock & OnDemand

Custom Manufacturing

Custom Threaded Inserts

MW Components specializes in custom manufacturing. Our team of engineering and fabrication experts is ready and available to assist you anywhere you happen to be in the design and production process. We offer optional tooling, CAD modeling, and prototyping assistance for custom projects in their beginning phases, as well as many secondary processes for the proper finishing of your custom component. We even perform in-house cleaning, polishing, and performance testing services as required.

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MW Components - Threaded Inserts for Plastics, Compression Limiters, CNC Studs

Threaded Inserts Manufacturing

MW Components produces threaded inserts and other fastener products for multiple industries and applications. Our threaded inserts are generally produced using aluminum, brass, bronze, copper, carbon steel, or stainless steel from round, hex, or square bar stock. We offer various optional machining services, secondary finishes, and certification options for your convenience to customize the exact part you need.

Assembly line component manufacturing

Related Manufacturing Services

In addition to standard engineering and manufacturing services, we offer various additional services as requested.


  • CAD Modeling
  • Grinding
  • Prototyping
  • Tooling

Optional finishing services for these products may include:


  • Plating
  • Heat Treatments

Quality Materials

Threaded inserts are commonly produced using one of the below materials. If you require specialty materials, contact us for custom quote information.


  • Brass
  • Stainless Steel


View Full List of Available Certifications


  • ISO9001:2000

Threaded Insert Styles & Configurations

  • 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.

  • 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.

Helpful Information on 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 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.