Product Design & Development

Self-clinching Threaded Standoffs

Monday, April 24, 2006

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Self-clinching Threaded Standoffs

Engineers can install PEM Type DSOS self-clinching threaded standoffs close to edges in thin metal sheets. The devices, which can be used to stack or space components in an assembly, are well suited for applications where space for fastening hardware is limited. These stainless, RoHS-compliant standoffs are said to feature strong and reusable metal threads that ensure secure attachment and enable component disassembly when required. The devices are available in two lengths and in thread sizes #4-40 and M3. They can be installed flush in steel or aluminum sheets as thin as 0.037 in. (0.94 mm) and with minimum centerline-to-edge distances of 0.126 in. (3.2 mm). To ensure proper installation, the standoff is inserted through a mounting hole with the appropriate diameter and into an anvil. Keeping punch and anvil surfaces parallel, sufficient squeezing force then can be applied until the standoff’s head embeds flush in the sheet. Engineers can choose to use a Pemserter press to aid in installation. Upon installation, the fastener becomes a permanent part of the metal assembly, and mating hardware completes final component attachment. CAD drawings of the standoffs are available in most formats at no cost. Steel-type devices are available upon request.


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