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Thread Forming Screws
Description: DIC Fasteners is a Manufacturer and Exporter of Thread Forming Screws that can either be drilled directly in or can use a pre-drilled hole to attach materials such as plastic and metal. These screws have tapered entering threads and multiple cutting edges to dig into the tapered hole. These screws are also known as thread rolling screws. Unlike screws, they do not remove any material.
https://tuffclassified.com/thread-forming-screws_1985918