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PEM® FHX™ Self-Clinching Flush-Head Studs with X-Press™ Thread Profile Quickly Mate with Push-On Plastic Fasteners or Wire Ties

26 April 2018

PEM® FHX self-clinching flush-head studs from PennEngineering® uniquely feature an X-Press thread profile enabling quick mating with push-on plastic nuts, wire tie products, or other plastic fasteners in thin metal assemblies. Their coarse thread design – larger threads relative to the stud’s diameter – reduces assembly time by allowing for easy mating of plastic parts and promotes especially high retention force. The thread design additionally accommodates paints and coatings without compromising fastener performance in service.

The studs install permanently in metal sheets as thin as 1mm. They press easily into place using any standard press or can be installed automatically during the stamping process using an automated PEMSERTER® press equipped with in-die technology. Upon installation, the head of the stud mounts flush in the metal sheet for a clean and attractive finished appearance. Domed stud heads are available on special order.

The studs are manufactured from hardened carbon steel and finished with zinc plus clear chromate as standard or a rust-preventive oil finish as an option. They can be supplied in 5mm or 6mm thread sizes and in lengths from 10mm to 25mm.

Detailed specifications, fastener drawings and 3D models, and performance data (Bulletin FH) can be viewed and downloaded for free at

Founded in 1942, PennEngineering is a global leader in the fastening industry with technical and manufacturing facilities in North America, Europe, and Asia supported by a global engineering-focused sales force and a worldwide network of authorised distributors.



About Penn Engineering
Penn Engineering & Manufacturing Corp. founded in 1942 in Doylestown, Pennsylvania, USA is the global leader in the design and manufacture of thin sheet fastening devices and installation systems.   The Company is the developer and the sole manufacturer of PEM® brand self-clinching, broaching, surface mount, weld and other fasteners.   The Company has manufacturing and technical facilities in two U.S. locations, Galway, Ireland and Kunshan, China. Together they support a network of exclusive global distributors and engineering representatives, providing customers with consistent quality, local sourcing, and technical expertise anywhere in the world.


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