Design Engineering

New microPEM TackScrew fasteners for compact electronics


General DPN

New microPEM TackScrew fasteners from PennEngineering integrate proven self-clinching technology for permanent sheet-to-sheet attachment while also incorporating a unique thread-like feature to allow fastener removal when necessary.

This combination adds functionality to the original microPEM TackPin™ fastener product line for thin sheet attachment applications, especially compact electronics.  TackScrew fasteners can even be reinstalled one time if desired.

These hardened stainless steel Type TS™ fasteners ultimately can serve as highly practical solutions to attach a top sheet or panel to a base material in applications ranging from laptops, notebooks, and tablet computers to smart phones, gaming and hand held devices, and wearable electronics, among others.

As suitable replacements for micro screws, TackScrew fasteners will not require the added costs of locking patches, threaded inserts, tapped holes or driver bits for initial installation, or potential rework due to cross threading and driver bit “cam out.”  The clinch technology resists vibrational loosening in service and the fastener’s low-profile head can add cosmetic value.

The fasteners install in thin sheets by preparing properly sized mounting holes in the sheet to be attached and the base panel.  After inserting the fastener into these holes, the fastener is pressed into place.  The fastener then clinches into the base panel and its head subsequently holds the top sheet (as thin as 0.2mm / .008”) firmly and permanently in place.  The base panel can be as hard as HRB 89 / HB 187 or less on the Rockwell “B” and Brinell scales, respectively, and as thin as 0.91mm / .036”.


These RoHS-compliant fasteners can be installed automatically for high-volume applications and can be reinstalled once by screwing them back into the sheet and using a thread-locking adhesive.  Detailed specifications, CAD models, animations, and performance data (Bulletin TS) can be accessed at the PEM website.


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