SI® Inserts

    SI® brand inserts employ press-in, molded-in, or heat/ultrasonic installation methods to provide strong, reusable, permanent threads in plastic. A global leader in the manufacturing of threaded inserts for plastics and other fasteners, Penn Engineering offers strong, high-quality SI® Inserts for a wide range of plastic assemblies and insertion methods.

    WE'RE MORE THAN JUST PARTS

    Fully customized kitting, bin stocking, labeling and more. Same-day shipping is available on most orders.

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