Self-Clinching Fasteners for Stainless Steel or High-Strength Aluminum

May 19, 2015

Penn EngineeringNew microPEM TackPin Type T4 self-clinching fasteners from PennEngineering, Danboro, PA, prove ideal for installation into stainless-steel and high-strength aluminum-alloy sheets. This latest addition to the microPEM family of fasteners enables sheet-to-sheet attachment for a wide range of applications in compact electronic assemblies wherever disassembly will not be required. They offer tangible benefits over micro-screws by eliminating typical screw-related issues, including costly tapping, cross threading, torque control and vibration back-out, and 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 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 the holes, squeezing force is applied to complete the installation process. The fastener’s head will then hold the top sheet (as thin as 0 .008 in.) firmly and permanently in place. The base panel can be as hard as HRB 88 or less and at least 0.035 in. thick.

Industry-Related Terms: Stainless Steel, Tapping, Torque
View Glossary of Metalforming Terms


See also: PennEngineering

Technologies: Bending


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