Experts in the development and manufacture of precision fasteners,
components and systems, specializing in thin sheet attachment solutions.

SI® Molded-In Inserts


Blind Threaded – Types IBA, IBB, IBC

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Blind threaded inserts, types IBA, IBB and IBC have a blind end, which protects the threads from plastic intrusion. Available in aluminum, brass, or stainless steel.

Self-Locking, Blind Threaded – Type IBLC

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Self-locking, blind threaded, type IBLC has deformed threads which lock the screw in place to resist vibration. The blind end protects the threads from plastic intrusion.

Thru Threaded – Types ITA, ITB, ITC

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Thru threaded inserts, types ITA, ITB and ITC include a pilot diameter and undercuts allowing the plastic to flow into grooves, providing high pullout resistance. Available in aluminum, brass, or stainless steel.

Thru Threaded, Knurled Spacers – Types STKA, STKB, STKC

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Thru threaded, knurled spacers, types STKA, STKB and STKC include a uniform knurl diameter which reduces the risk of sink marks. They are also available in varying lengths for injection molding assemblies. Available in aluminum, brass, or stainless steel.

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