​Enabling easier mating hole alignment 13 May 2015

PennEngineering® says that its PEM® floating self-clinching nuts for stainless steel assemblies enable easier mating hole alignment to promote design flexibility in relaxed tolerance applications.

PEM® floating self-clinching nuts can be specified either with non-locking or self-locking threads and will permit up to 0.015 inches/0.38mm minimum float in all directions from the centre. PennEngineering® explains the unique engineering of the floating self-clinching nuts further imparts added strength and support in an assembly by permitting fastener threads to extend fully into their retainer shank.

This family of fasteners includes non-locking Type A4 nuts (with free running load-bearing threads) and self-locking Type LA4 nuts (with prevailing torque locking threads). PennEngineering says they will install and perform reliably in stainless sheets as thin as 0.038 inches/0.97mm and greater with hardness of HRB 88 or less on the Rockwell ‘B’ scale. Available thread sizes for both types range from #4 – 40 through #10 – 32 and M3 through M5.

The nuts install easily and quickly by squeezing them into properly sized holes using a PEMSERTER® press or other standard equipment to develop sufficient force. The fasteners then clinch permanently into place with the side opposite the fastener remaining flush. Ultimately, they become an integral part of a stainless assembly, provide reusable load-bearing threads to accept mating hardware, and exhibit high torque-out and push-out resistances in service.

Detailed specifications, CAD models, and performance data (Bulletin ALA) for these RoHS-compliant nuts can be accessed online.

Claire Aldridge Deputy Editor t: +44 (0) 1727 743 889

Having spent a decade in the fastener industry experiencing every facet – from steel mills, fastener manufacturers, wholesalers, distributors, as well as machinery builders and plating + coating companies, Claire has developed an in-depth knowledge of all things fasteners.

Alongside visiting numerous companies, exhibitions and conferences around the world, Claire has also interviewed high profile figures – focusing on key topics impacting the sector and making sure readers stay up to date with the latest developments within the industry.