Design Engineering

PennEngineering self-clinching fasteners for stainless steel sheets


General DPN

New patented microPEM TackPin Type T4 self-clinching fasteners have been introduced by PennEngineering as suitable hardware solutions for installation into stainless steel or higher-strength aluminum alloy sheets.

This latest addition to the microPEM line of fasteners enables sheet-to-sheet attachment for a wide range of applications in compact electronic assemblies wherever disassembly will not be required.

Units offer tangible benefits over micro screws by eliminating typical screw-related issues, including costly tapping, cross threading, torque control, and vibration back-out, and further provide designers with practical alternatives to welds or adhesives.  Ultimately, microPEM Type T4 fasteners will promote quick and cost-effective installation, even automatically for high volume applications, using minimal hardware.

Noteworthy fastener design features include an interference fit to minimize hole tolerance issues, a tapered tip to assist in location, and a low-profile head to save space.

Manufactured from 400 Series stainless steel, microPEM Type T4 fasteners install easily by first preparing properly sized mounting holes in the sheet to be attached and the base panel.  After inserting the fastener into these holes, squeezing force is applied to complete the installation process.  


The fastener’s head will then hold the top sheet (as thin as 0.2 mm/.008 in.) firmly and permanently in place.  The base panel can be as hard as HRB 88 or less on the Rockwell “B” scale and at least 0.89 mm/.035 in. in thickness.

Detailed specifications, CAD models, installation animations, and performance data (Bulletin T4) for these RoHS-compliant fasteners can be accessed here.


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