Compact brass inserts suitable for insertion in all types of plastics — used with both hot plastic molding and cold plastic molding. Best suited for electrical molded box applications.

Brass helical inserts are compact inserts suitable for insertion in all types of plastics. They are used with both hot plastic molding and cold plastic molding processes, making them a flexible choice across different manufacturing setups.
Their compact form factor and threading make them best suited for electrical molded box applications — where space inside the molded enclosure is limited but a reliable internal thread is required.
Standard ranges shown. Custom sizes, threads, materials and finishes produced to drawing.
Helical inserts solve a specific problem in plastic molding: when the molded part is too compact for a standard threaded insert but still needs a reliable internal thread for assembly.
Prime supplies helical inserts in standard catalogue sizes and develops custom variants to drawing — with bespoke thread forms, lengths and brass compositions.
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