Threads in plastic
that do not strip out.
Tapping a plastic boss is a guarantee of early failure. The right threaded insert gives a metal thread in PEEK, PA, PPS or ABS that survives a lifetime of assembly cycles.
A metal thread where the resin alone cannot hold
Engineering plastics are strong but soft under repeated torque. A molded-in, heat-set or ultrasonic insert fuses into the boss, distributing load into the surrounding plastic and resisting pull-out and torque-out. We supply knurled and grooved brass inserts plus stainless versions for demanding housings, and advise on wall thickness and boss design.
- Heat-set, ultrasonic and press-in inserts for every housing process
- Brass and austenitic stainless inserts in M2-M10
- Diamond-knurl and axial-groove forms for torque and pull-out resistance
- Boss and wall-thickness guidance to avoid sink marks and cracking
Housings we thread
Consumer electronics
Heat-set inserts holding shells, battery doors and assemblies that get serviced.
Automotive interior & sensors
Inserts that hold clips, covers and modules through thermal cycling and vibration.
Medical & industrial devices
Reusable, clean threads in housings that must meet hygiene and reliability specs.
The inserts plastics engineers ask for most
Thread inserts & bushings
Heat-set, ultrasonic and press-in inserts for plastic and soft housings.
View familySleeves & custom parts
Custom insert geometries and molded bosses to your housing design.
View familyMicro precision screws
Fine-pitch screws that run into the inserts on miniaturized devices.
View familyPlastic insert questions we hear most
Heat-set suits most thermoplastics in production; ultrasonic suits high volumes and tight cavities. We will match the insert knurl and energy director to your process and resin.
Rule of thumb is a wall around 1.5 to 2x the insert diameter, with controlled material around the knurl. We review your boss drawing to avoid sink and cracking.
Yes - that is the point. A proper metal insert is rated for dozens of assembly cycles, while a tapped plastic boss strips after a handful.
Designing a plastic housing that must not strip?
Send the resin, boss size and assembly cycles - we will specify the insert type, material and knurl to hold.
