Technical Articles

PennEngineering has published these technical articles:

(Fastening and Joining)
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The demand for quality control of components and cleanliness testing have risen steadily in recent years-so much so that clean manufacturing is now one of the main issues in the automotive industry....
(Fastening and Joining)
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All PennEngineering catalog bulletins list a standard finish and some also list optional finishes. There are also a wide variety of special finishes available to meet customer requirements when the...
(Fastening and Joining)
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This paper explores how solder joint strength is affected by reflow curves, and what the impact is of lower reflow temperatures and the use of lead-free solders. The peak temperature (PT), time above...
(Fastening and Joining)
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Engineers, designers, and manufacturers often choose clinch fasteners to eliminate the need for loose hardware or to provide a method to include threads in thin sheets. Self-clinching fasteners are...
(Fastening and Joining)
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There are many existing options to meet the requirements of an effective heat sink fastening system. Available solutions for larger heat sinks often involve hardware requiring threaded sections in the...
(Plastics, Elastomers and Polymers)
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The best method depends on the part requirements. Some assembled plastic parts need to be taken apart and reassembled, possibly multiple times. In those cases, the best fastening options are metal...
(Fastening and Joining)
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Fewer assembly steps. Since the task of hardware installation is done during fabrication, the number of steps required for final assembly time is reduced. Broadly defined, a self-clinching fastener...
(Fastening and Joining)
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Installation forces published in PennEngineering catalogs for self-clinching and broaching fasteners are always shown in units of force. Values are in pounds for unified parts and in KiloNewtons for...
(Fastening and Joining)
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Coating requirements regarding PEM materials and manufacturing...
(Fastening and Joining)
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In our long history of working with customers in the application of our self-clinching nuts, PennEngineering has seen numerous instances of thread interference preventing proper clamp load when the...
(Fastening and Joining)
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The microPEM® line of fasteners from PennEngineering introduces some new thread designations which may not be familiar to many users. This technical sheet will present the differences between...
(Fastening and Joining)
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The term "minimum distance hole-centerline-to-edge" is defined as the minimum distance the mounting hold centerline may be to one edge of a panel to still allow the proper clinching of a fastener into...
(Fastening and Joining)
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Specification NASM25027 is a rather lengthy spec which includes many requirements for attributes such as tensile strength and wrenching strength which are not applicable to PEM self-clinching,...
(Fastening and Joining)
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Loosening of threaded fasteners due to vibration has been a problem from the first use of threaded fasteners. However, the cause of vibration loosening was not well understood until relatively...
(Specialized Industrial Products)
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The demand for technical cleanliness has risen sharply in recent years. What started out as a quality control process for the automotive market has become a priority for many industries including...
(Fastening and Joining)
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In certain situations, PEM Type S nuts can be installed successfully without the need to pre punch a mounting hole in a separate operation. If these criteria are met, the fastener, along with the...
(Fastening and Joining)
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Properly installed self-clinching fasteners are designed to provide permanent load bearing threads in thin metal sheets. When installed the fasteners become an integral part of the host panel and will...
(Fastening and Joining)
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Installs into s700 HSLA sheets up to 950MPa (hardness up to 25HRC) and as thin as 0.8mm. Thread sizes include M6, M8, M10, 1/4-20, 5/16-18, 3/8-16 and 7/16-20....
(Fastening and Joining)
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PEM® self-clinching standoffs install with a squeeze in properly sized round mounting holes and become permanently mounted in the thin sheet. These standoffs enable components to be stacked or...
(Fastening and Joining)
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Steel and aluminum panels in assemblies often will undergo surface finishing for reasons ranging from cosmetics to performance, while stainless steel panels may require passivation. For any assembly...
(Fastening and Joining)
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A self-clinching fastener's performance can be divided into two major types....
(Fastening and Joining)
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Occasionally, users of our self-clinching fasteners encounter thread binding issues when assembling fasteners made from stainless steel. This problem is typically related to galling. This technical...
(Fastening and Joining)
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Many years of experience with customer concerns related to threads indicates there is value in clarifying three main areas of thread inspection criteria. These three areas are: 1. The proper use of NO...
(Fastening and Joining)
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The most important point relative to this topic, and a matter which is frequently overlooked, is the fact that self-clinching fasteners are not inherently self-centering in a mounting hole into which...
(Fastening and Joining)
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A mounting hole is punched or drilled in a panel of sufficient thickness, the fastener is placed in the mounting hole, and an electrode squeezing force, a secondary current, and timing cycle are...
(Fastening and Joining)
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Description of definitions relating to torque: prevailing torque, tension strength, etc....
(Fastening and Joining)
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In our literature we simply call out our zinc plating as zinc plated 5┬Ám, colorless, plus sealant/ lubricant. Further, but not generally noted is that this plating meets appearance requirements as...