Fastener Technology

5 Common Mistakes to Avoid When Choosing Fasteners for Your Manufacturing Project

Hardware Assortment

It’s not uncommon for manufacturers to overlook the importance of incorporating high-quality fasteners within their product designs. Whether it’s choosing nuts, bolts, screws, washers, anchors, or rivets, these hardware devices are critical for affixing two or more parts, materials, or objects. Here are five common mistakes to avoid when choosing fasteners.

1. Choosing Price Over Quality

It’s easy to get enamored by the potential savings of using low-priced fasteners. Reducing the costs of new product designs increases profit. Unfortunately, the savings on low-cost fasteners are quickly eroded with longer assembly cycle times in production. Even if the fasteners pass the final QC inspection, it’s more than likely they’ll fail in the field once the customer uses the product.

2. Using the Wrong Fastener for Your Design

Using the right fastener in design is critical to ensuring the integrity, strength, rigidity, and durability of your finished part. That selection must be based on the types of materials you’re using and the types of parts or sub-assemblies you’re joining or connecting. In many instances, it’s a question of product safety. Using the wrong fastener or wrong fastener material can make your joints susceptible to cracking, bending, or buckling.

3. Dissimilar Metals in Your Bolted Joint (Galvanic Corrosion)

Galvanic corrosion occurs when two different metals are exposed to water. One metal becomes the reducing electrode (anode), while the other becomes the positive electrode (cathode). These two create an electrochemical reaction that eventually leads to galvanic corrosion. This is a common occurrence for finished goods exposed to elements like moisture and humidity where the fastener material is different from the base material.

4. Incorrect Torque

In layman’s terms, incorrect torque refers to either over-tightening or under-tightening fasteners. The goal is to find the ideal amount of clamping force to ensure the joints or parts remain secured without breaking, cracking, or failing. When the tension is too high the fasteners become stressed and can tear, rip, or break. When the tension is too low, excessive vibration leads to the fasteners becoming dislodged or loose.

5. Wrong Grade of Material

Fasteners can be made of plastic, composites, brass, steel, titanium, aluminum, chrome, carbon steel, etc. However, choosing the wrong grade of material can lead to your product’s premature failure. When choosing your fastener’s grade, think about the grade’s mechanical properties in terms of its tensile, fatigue, and shear strength.

Aside from the grade’s mechanical properties, it’s also important to understand how that material reacts under different environmental and operating conditions. Industrial finished goods are often exposed to corrosive environments. Without the proper coating, fasteners can easily corrode. Galvanized, nickel-plated, brass, and zinc-plated are just some of the coating options that help to protect fasteners from corrosion.

Making the Right Choice

Don’t make the all-too-common mistake of glossing over fasteners in your design. Use low-quality hardware or assume that all fixtures are the same, and a failure is more than likely. The right hardware ensures your non-permanent joints remain intact. In the end, it’s about the integrity of your finished good and your company’s reputation.




September 22, 2023
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The Role of Fasteners in Sustainability

sustainability in manufacturing

Sustainability has become an increasingly important issue in manufacturing as the global community seeks to reduce its carbon footprint and protect the environment. One aspect of sustainability often overlooked is the choice of fasteners used in manufacturing.  Fasteners such as bolts, screws, and nuts are essential components of many products, and choosing environmentally friendly options can have a significant impact on the sustainability of the manufacturing process.

Ensuring your suppliers are in compliance with RoHS/REACH is a good baseline start to bringing sustainability to your manufacturing.  RoHS bans the use of certain substances used in the making of electrical and electronic equipment such as lead, cadmium, and hexavalent chromium.  REACH places responsibility on the industry to be transparent on its use of chemicals in manufacturing and report the properties of chemical substances to a central database.  Bossard is actively working with our manufacturers to offer products that are in compliance with the European Union Environmental Directive and constantly monitor environmental RoHS/REACH directives.

One option for sustainable fasteners is to choose environmentally friendly coatings and fastener finish.  A clean and environmentally friendly coating Bossard offers is a line of Tribological dry-coated fasteners.  This type of coating is a non-electrolytically applied thin layer with integrated lubrication properties, protection against contact corrosion, and no risk of hydrogen embrittlement further saving on the potential for waste.

Additionally, it is essential to consider the end-of-life of fasteners when choosing environmentally friendly options. Fasteners that can be easily disassembled and reused or recycled are preferable to those that are difficult to disassemble or cannot be recycled.  For example, stainless steel fasteners are a great choice to consider due to corrosion resistance, no additional finish requirement as well as ease of recycling.

Finally, choosing fasteners that are locally sourced can reduce the environmental impact of transportation. Sourcing fasteners from local suppliers reduces the distance that the products need to be transported, reducing carbon emissions and fuel consumption.

In addition, tracking usage over time by using big data and real-time analytics can also aid in procurement on an optimized schedule further reducing energy overhead in transport or storage.  Analytics can also eliminate wastage due to excess inventory.  Bossard’s ARIMs platform and Smart Factory Logistics can provide you with the data to optimize your C-parts procurement plan and aid in sustainability efforts.

In conclusion, choosing environmentally friendly fasteners is an easy way to make a significant impact on the sustainability of the manufacturing process. By choosing fasteners made from durable materials, prioritizing disassembly and recyclability, smart procurement planning, and sourcing locally, manufacturers can take an important step towards a more sustainable future.




April 28, 2023
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What to Know About Fastener Certification and Compliance

Fasteners play a critical role in holding your assembly together and can affect many aspects of your product lifecycle.  Joint strength, manufacturability, performance in various environments and even maintenance over the assemblies lifespan are all factors directly impacted by fasteners.  Unfortunately, fastener performance is affected by its quality of raw material, manufacturing and even plating.  To that end, many manufacturers rely on fastener certs and proof of compliance to ensure a fastener defect does not become a defect of your whole assembly. 

Importance of Fastener Certification and Validation

The following fastener conformance, tests and reports can be requested to ensure quality of your manufacturing and enforce standards.

The Fastener Quality Act

(FQA) in the United States makes it illegal to falsely represent fasteners’ chemical and mechanical properties by misrepresenting or altering certificates of conformance, material test reports, inspection reports, and all records attesting to a fastener’s characteristics and performance. Originally meant as a sweeping reform to combat an influx of inferior, mis-marked and counterfeit parts during the 1980’s, the act is now limited to hardened and grade-marked high strength fasteners.

Restriction of Hazardous Substances

Commonly known as RoHS – is a European directive adopted in 2003 that prohibits using hazardous heavy metals in manufacturing components for industrial and commercial use. These include metals such as mercury, lead, hexavalent chromium, and cadmium, in addition to thermoplastic resins like polybrominated diphenyl ethers (PBDE), phthalates (DEHP), and polybrominated biphenyls (PBB), etc.

The Registration Evaluation Authorization and Restriction of Chemicals

(REACH) regulation is another European initiative launched in 2006 with the aim of restriction certain chemicals and substances in manufacturing. This regulation was enacted to protect the environment and everyday consumers from harmful substances and noxious chemicals.

CoC – Certificate of Conformance (or Compliance)

The fastener manufacturer provides a CoC to ensure the fastener meets industry or customer specifications.

MTR – Material Test Report (also known as – Inspection Report, Test Report, Chem-Phys Report)

A Material Test Report – often referred to simply as a “Mill” Test – is a document that attests to a given material’s mechanical and chemical properties. It is viewed as a quality document or certified record that the material and part meet the required specifications.  

Plating Certification

A plating certification – or plating cert – states that the plating process successfully applied a coating or layer of metal to a given surface, helping to protect it against corrosion, scratches, and extreme environments.

ISIR – Initial Sample Inspection Report

An ISIR report is a critical part of following established initial sampling processes. These processes are sometimes required by customers and are used to validate the fastener’s quality and use in production.  

PPAP – Production Part Approval Process

A standard requirement in the automotive and aerospace industry, the Production Part Approval Process is a procedure listing 18 steps to ensure repeatability, conformity, and consistency in fastener manufacturing.

DFARS Compliance: The Defense Federal Acquisition Regulations Supplement

DFARS compliance is an absolute must for defense contractors. Compliance provides guidelines and restrictions governing raw material selection to minimize dependence on foreign material sources.

Going beyond the standard – Full-Service Quality Solutions From Bossard

In addition to providing fastener certs and manufacturer declarations, Bossard can provide customized quality assurance with our Expert Test Services.

Dedicated towards the testing of mechanical fasteners, our ISO/IEC 17025 accredited test laboratories are staffed with qualified engineers and state-of-the-art test equipment.  If you require failure analysis or independent confirmation of product quality, Bossard Expert Test Services can provide you with a sound basis for making informed decisions regarding your fasteners and ensure high quality products.




January 27, 2023
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Importance of Choosing The Right Fastener for Design for Manufacturing and Assembly (DFMA)

The Next Big Thing in the Product Design Process

Selecting the best fastener for your application can be tough. To make matters worse, not all fasteners are created equally. Choosing the correct fastener design, finish or material type can make all the difference in assembling a quality product.  As such, it’s imperative to choose the right fastener as early on in the design process as possible and this sentiment outlines the notion of Design for Manufacturing (DFM). Let’s take a closer look at the importance of choosing the right fastener and why DFM principles can serve as a guiding light in the journey. 

What Is Design for Manufacturing?

Design for Manufacturing or Design for Manufacturing and Assembly involves optimizing the design of a product for efficiency in assembly, cost and quality.  To embrace DFM, you must engineer or design in a component or bolted joint with these principles in mind during the product’s design stage.

The alternative is to design the product and then choose the fastener. This less efficient practice can lead to inefficient assembly, weak joints or the necessity of special fasteners, which are not readily available or common. Using special fasteners can also:

  • Greatly increase the cost of production
  • Reduce the lifespan of the product
  • Cause product malfunctions
  • Lead to product performance issues

Implementing Design for Manufacturing and Assembly Principles in Fastener Selection

Design for Manufacturing and Assembly should occur early in the development of a product during the design phase. When using this discipline, manufacturing will become efficient and cost effective, since choosing the right fasteners can later define the assembly process and reduce tooling.   While the exact DFM workflow can be tailored to the unique application and part being designed, a few general DFM principles are:

  • Design fasteners and objects for fast and efficient assembly.
  • Work to standardize components and materials to save money.
  • Achieve design simplicity by reducing the number of parts and complications.
  • Minimize the number of manufacturing operations required on fasteners during assembly.

Why Are DFM Principles Important in Fastener Selection?

Design For Manufacturing represents the evolution of product design and can be leveraged to produce products more economically and at higher quality.  No other component in the assembly process can have as broad of an impact on your DFM as choosing the right fastener.  A few key benefits and reasons why fastener selection should be a core focus of your DFM planning:

  • More cost-effective production.
  • Faster time-to-market.
  • Reduction of the product development process.
  • Production will be up to speed quicker.
  • Components can be combined to reduce assembly steps and the number of parts.
  • It detects and removes faults or mistakes.
  • Delivers a higher quality of the product because the design can be enhanced and refined at each stage.
  • It can create a safer working environment.

Contact Bossard for Fastener Selection Assistance 

Fasteners are engineered to hold two parts together. With this in mind, it’s best to avoid adding “higher responsibilities” to simple fasteners and work to achieve design simplicity. A few additional basic rules for choosing the best fasteners are:

  • Fasteners must always be equal to, or better than, the assembled parts.
  • Bolted joints may never be points of weakness.
  • Assembled fasteners should always be controllable as well as exchangeable.

In the end, making fasteners a top priority in the design process by embracing Design for Manufacturing and Assembly principles can unlock all of the aforementioned benefits and more.  Want to implement DFM for your assembly and don’t know where to start?  Bossard’s Assembly Technology Expert Services and Engineers are available to help.

For help with choosing the right fastener for you or if you have other questions about fastener technology, contact us at


December 09, 2022
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Fastener Head Style

Fastener Head

When you start looking for fastening solutions at Bossard, you’ll notice that we carry a diverse variety of screws and bolts. One way to distinguish one from the other is through the type of head that they have. The following are some of the most common styles. While head styles do have a specific purpose in creating a mechanical joint, you can find out which is most appropriate for your assembly by contacting your local Bossard agent.

Countersunk Screw Heads

If a screw has angles under the head, it demands countersinking to prevent the wood from splitting during drilling or other force. Countersunk screw heads include the following:

  • Flatheads sit flush against the surface of the material being screwed, which makes for a cleaner appearance and prevents anything from being caught on them. If you’re fastening wood or plastic laminate components, a screw cover hides the head completely.
  • Roundheads, which are also called raised screw heads, use angles similar to that of flat heads, so they require countersinking. Their domed heads look decorative, so they are used where appearance is important, such as for switch covers. Roundheads that are designed for a socket drive are called button heads.
  • Bugle heads reduce damage to material by spreading the joint stress over a broader surface than flatheads. They’re used mostly for plasterboard, wood decking, and drywall. They are self-drilling, which means they compress the surrounding drywall and paper to create a countersunk hole during drilling.

Both flat and round heads generally demand a pilot hole, which is a small hole drilled to guide the main screw in.

Non-Countersunk Screw Heads

Non-countersunk screw heads are the most common type and have flat surfaces under the head, which avoids countersinking. They are fully exposed above the surface of the material being screwed.

  • Domed heads have a rounded head that adds aesthetic appeal to a product.
  • Button heads also have a round design but are used with socket-driven screws and Torx drive recesses.
  • Pan heads are the most common type of flat-bottomed screw. They are versatile enough to substitute for other round styles.
  • Fillister heads use a slightly rounded top with a small diameter on high cylindrical sides. Their higher profile requires a deeper drive slot than round or pan head screws.
  • Truss heads are wider and slightly rounded to produce a lower profile and larger bearing surface. They are useful for sheet metal joints.
  • Hex heads allow for more torque and demand a socket or wrench for installation.
  • Socket cap heads require socket drive recesses for flush installation against the surface. They deliver a smooth appearance despite being non-countersunk.
  • Square heads are found in bolts and screws. They require a wrench for installation.

Bolt Heads

Some bolt heads have shapes that are similar to screw heads, such as flat, round, truss, and hex. Unique types include the carriage bolt, which uses a rounded dome with a square underside, anchor bolts, which do not contain a head, and J and U bolts, which look like their namesakes.




August 05, 2022
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Fastener Finish: Platings and Coatings for Fasteners

Fastener Finish

The finish, or coating, is just as important as the design when you want your fasteners to last for the life of your product. If you want more information on the description below, please contact your local Bossard agent.

Factors to Consider

When you’re trying to decide on the correct finish, consider the following factors.

·         Safety. Improperly applied finish may make the fastener fail. A common failure point that can be introduced by finish is hydrogen embrittlement. Embrittlement reduces ductility and load-bearing because the metal absorbs too much hydrogen during the plating process. Choosing a dip-spin coating or Bossard’s ecosyn® tribological dry coating over using an electroplated finish can alleviate this risk.

·         Corrosion Protection. How long will the finish last based on its operating environment? The fastener requires a stronger coating if it endures very severe conditions that include saline solutions, cleaners, moisture, and collisions that produce abrasions, scratching, and denting.

·         Resistance to Handling Damage. How frequently will workers handle or use tools on the fastener? A softer and more brittle finish demands more care during handling and assembly.

·         Criticality of the Joint. What happens to the entire assembly if a joint becomes loose? Some finishes do not have known friction values. Avoid those finishes for fasteners on joints with consistent and repeatable clamp loads.

·         Functionality. Fasteners with small diameters and threads that have internal recess drives may leave too much coating material in the recesses or threads if the wrong finish is used.

·         Cost. Exotic coatings will increase the price of the fastener and the total cost of production.

·         Availability. Is the finish you want readily available? Or will it have to be special-ordered, which demands a greater lead time and more expense?

Common Finishes

If cost or time is a concern, rely on the following fastener coatings, which are easily available.

·         Electrodeposited (Commercial) Zinc. This finish is inexpensive, works under mild to moderate conditions, and is moderately resistant to handling damage. It has no problems with recess fill or threads. However, its friction is harder to control and it risks hydrogen embrittlement at high strengths.

·         Electrodeposited Zinc Nickel. This finish functions well under severe to very severe conditions and has good resistance to handling damage. It is also free of issues with recess fill or threads but has a high cost, difficult-to-control friction, and is not as available as commercial zinc. The chances for hydrogen embrittlement are lower but still existent.

·         Mechanical Zinc. With no hydrogen embrittlement risk, this finish features moderate resistance to handling damage and mild to moderate corrosion. It is not recommended for threads because of poor coverage in recesses and holes. The cost is medium to high while availability ranges from medium to low.

·         Zinc Flake. Hydrogen embrittlement is not a risk for this finish that protects against severe to very severe corrosion and has high friction control. It is moderately resistant to handling damage but is not recommended for any fasteners with an internal drive. The cost is moderate.

·         Hot Dip Galvanized. Protecting against severe to very severe corrosion, this moderately-priced coating has excellent handling-damage resistance and moderate cost. However, friction is difficult to control and it is not recommended for threads less than M8 or with an internal drive. The risk for hydrogen embrittlement is low.

·         Epoxy Electrocoat. This coating has no hydrogen embrittlement risk, works under severe to very severe conditions, is moderately resistant to handling damage, and is excellent at controlling friction. It has no problems with recess fill or threads at M4 or more. But it is pricey.


·         Tribological Dry Coatings. A solution for mechanically stressed fastening elements and components, such as screws, nuts and washers. The coating is a non-electrolytically applied thin layer with integrated lubrication properties and additional corrosion protection.

July 08, 2022
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Multifunctional fasteners: Bossard Selection

At Bossard, we believe in the spirit of constant innovation and smart ideas when it comes to satisfying our customers.  Introducing the Bossard Selection, a group of multifunctional fasteners carefully chosen by our experts to help you carry out your assembly with more speed, reliability, quality, and economy.

Multifunctionality Enhances Productivity

What sets the Bossard Selection apart from any other group of fasteners is the care and consideration put into their selection. Each product combines several fastening elements into one pre assembled fastener.  The end result is efficient fasteners that optimize your assembly in numerous ways.

Here’s what sets the Bossard Selection apart from any other group of fasteners:

  • Multifunctional in the application – Our multifunction fasteners are incredibly versatile, making them an ideal fit for any application no matter what your needs are.
  • Fewer individual pieces – Multifunctional captive screw assemblies also means fewer fasteners needed to accomplish a particular process.
  • Shorter throughput time – Less parts to source, gather and move.
  • Faster and safer assembly – With our fasteners, each process takes less time and less risk to complete.
  • Reduced installation time – A simpler installation process also means less time needed for each process.  Optimized drive heads, captive washers and enhanced drilling capability saves you time at assembly.
  • Increased productivity – Our multifunctional fasteners make the assembly process more efficient and, most importantly, more productive.

The benefits don’t just end there. With our multifunctional fasteners, reduction of product can provide over 30% rationalisation potential in the entire value chain of each fastening.

Worldwide Availability

Another way the Bossard Selection sets itself apart from other products is through ready availability. Our international procurement ensures that every product featured in the Bossard Selection is available from stock. Not only do you get security of supply, but you’ll also enjoy the significant cost reductions and improved planning that comes of it. This is how we leverage our decades of experience in the global procurement and purchasing of fastening products.

Available Multi-functional Fastening Solutions

  • ecosyn®-fix – Shake-proof and vibration-proof, these economical screws provide reduced assembly time and material management costs by integrating a spring washer into the head, all while providing extra security for a broad range of applications.
  • ecosyn®-drill / ecosyn®-MRX – Self-drilling direct screwing fasteners for applications involving aluminum, steel plates, and corrosion-resistant thinwall sheets. Offers high drilling performance. Available in zinc plated blue or stainless steel.
  • Hexalobular (6 Lobe) socket – Designed to evenly distribute torque forces, resulting in a low rate of wear and optimum power transmission for longer tool life.  Available for many different head types, hexalobular can reduce your investment in tooling.
  • Innovation – Simple, yet effective. The ideal fasteners for ensuring reliable and creative assembly with a selection of low head and captive washer screws.

Exclusively from Bossard

“Proven Productivity” is more than just a promise – it’s a fact evinced by providing our customers with products that increase their productivity. At Bossard, we fulfill that promise using exclusive products with unique features that are well-suited to our customers’ needs. You won’t find the Bossard Selection anywhere else.


To learn more about the Bossard Selection or any of our other product solutions, reach out to us at




June 10, 2022
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Two Customer Success Stories: How Bossard Adds Value

Expert Walk

Success comes in many forms, but when you partner with Bossard for fastening solutions and manufacturing expertise, success comes in all forms. And you don’t have to take our word for it! Simply ask any of our clients for their own success stories. Let’s take a quick look at how clients partnered with Bossard for success. 

Tailor-Made Solutions Drive Excellent Results

Since 1866, Borgers has been associated with engineering premium textile components. Johann Borgers GmbH mainly focuses on delivering custom solutions for commercial vehicles and automobiles. The manufacturer produces coverings and absorbers for trunk loading floors, sidewalls, rear window shelves, as well a host of other essential components. No matter the application, each component depends on reliable fastening solutions. The spectrum of materials employed ranges from:

  • Thermoplastic carriers
  • Duroplastic carriers
  • Polyurethane films
  • Needle felts
  • Genuine leather applications
  • And more

But when introduced to Bossard’s new MM-Welding technology, they immediately recognized the potential for real economic benefits. 

Bossard’s New MM-Welding Technology Is a Perfect Fit

The MM-Welding technology utilizes ultrasonic vibration to push thermoplastic fasteners through the top layer of porous sandwich materials without any preliminary processing or drilling. The friction between the component and fastener surface morphs the surface of the fastener into the connecting material. Due to the hardness of the material, the fastener manages to retain its shape and can be immediately loaded following the connection process. 

Mark Maibom, Industrial Engineer Expert, Johann Borgers GmbH explains, “The MM-Welding® technology appeared to be tailor-made for us since so many of our products are based on the porous PUR sandwich components for which the process was developed.” Because utilizing this innovative solution only takes a second, Bossard’s MM-Welding technology was an instant improvement and led to efficiencies. 

Previous conventional joining methods always required extra work and came with limitations. Specifically, the team at Borgers had to pre-process and post-process the drill hole; or they were required to factor in longer drying times and longer hardening times. With Bossard’s MM-Welding technology, the team projects significant cost savings in the future.  

Garo Poland’s Success Story Is Highlighted by a 33% Reduction in Inventory 

Garo Poland is the biggest manufacture of electric vehicle charging systems in Northern Europe. Specializing in electrical installations and systems, this innovative firm is committed to lean management and innovation. And for several years, Garo has turned to Bossard for our SmartBin logistics systems to help achieve it’s lean manufacturing goals.

Our cutting-edge material management solutions have been instrumental in driving efficiencies in their production process. To help facilitate lean management at Garo, seven locations are equipped with Bossard SmartBin Systems that oversee more than 900 order items. With an average of 22,700 fastening solutions being processed every day, processes must be under control. And Bossard’s interactive supply chain platform —ARIMS— material management is more predictable and leaner. 

ARIMS Is the Best Inventory Management Software

With the goal of a fully efficient operation, the right material must be at the right place every time. And Bossard’s ARIMS platform helps ensure the right C-parts are available when needed. Enhanced by cloud technology associated with the ARIMS platform, the generation and sorting of procurement orders are optimized.

In addition, SmartOrdering with ARIMS provides a myriad of demand forecasts and improved procurement processes for supply chain optimization. Ordering and delivering processes can be consistently optimized by leveraging historical data and artificial intelligence. The automated process helps limit employee workload and leads to time savings.

Supply Chain Optimization Reduces Inventory by 33%


One of the key tell-tale signs of success for Garo is that they have been able to reduce inventories by a masterful 33%. This means that less capital is tied up, and they can rededicate resources to driving their core competencies — including innovation potential. 




May 27, 2022
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How the SFC Koenig Expander Sealing Plug Can Save You Money

Koenig check valves-plug

Today, finding ways to reduce costs and create efficiencies is more important than ever. Fortunately, the team at Bossard offers a number of innovative solutions designed to help you do just that. And one of our leading solutions is the Koenig Expander Sealing Plug. Across the world, the Koenig-Expander is recognized as a cutting-edge solution for quickly, efficiently, and reliably sealing drilled holes or creating flow control in fluid systems. Let’s take a closer look at how the SFC Koenig Expander sealing plug can save you money. 

The Koenig Expander Tool Offers an Array of Money-Saving Benefits

As the premier solution for reliable and quick sealing of drilled holes, the Koenig Expander tool is uniquely engineered to create efficiencies and save your company money. Here are a few key ways this innovative solution can create savings:

  1. Process reliability in installation. As a world-renowned solution, the Koenig Expander Tool boasts exceptional reliability across all applications. 
  2. Super-efficient setup. Setting up the Koenig Expander tool is easy and is designed to save time, which leads to reduced labor costs.
  3. Available in a vast range of materials. Whether you need marine fasteners or a solution for other applications, the Koenig Expander tool is available in a vast array of materials. And the team at Bossard can help you customize your Koenig Expander to best meet the application requirements. 
  4. Versatility comes standard. The Koenig Expander Sealing Plug is extremely versatile and can be used to meet the requirements for the widest possible range of applications. This universal applicability means it can be used in more ways than one, which can reduce inventory costs and streamline processes. 

A Quick Look at the Koenig Expander Sealing Plug

While the Koenig Expander Sealing Plug is available in an array of materials, they all share one thing in common — exceptional versatility. No matter the substrate, the Koenig Expander works to permanently resist even the most extreme pressures and loads.

  1. Designed for use in base materials of high and low hardness (up to 450 bar pressure), anchorage and expansion of the sleeve in the hole wall in the MB Series is achieved by pressing the ball into the sleeve. 
  2. The CV Series Expander plugs are offered in inch sizes, metric sizes, as well as in different surface treatments and materials. Anchorage and expansion of sleeve in hole wall are also attained by pressing the ball into the sleeve. 
  3. Using the tension/expansion concept, the LK Series is perfect for lower pressure applications (max 60 bar). Once sufficient force is achieved, the expanding element instinctively breaks off at the preset breaking point. 
  4. Suitable for use in high-pressure applications (up to 500 bar) and in light metals, the SK Series also functions based on the tension/expansion concept — where breaking off of the expanding element occurs after achieving sufficient force. 
  5. Suitable for lower pressures, the versatile press-fit and anchoring concept of the LP Series utilizes a conical press-in sleeve. In the installation process, it adapts to the bore while the exterior serration bites into the bore wall.  

The Versatility of the SFC Koenig Expander Tool

The Koenig Expander was originally engineered for use in plugging hydraulic assemblies. Today, this cutting-edge plug is the established and the preferred solution for sealing and flow control in hydraulic systems across a vast expanse of industries and applications, including:

  • Braking systems 
  • Suspension systems
  • Engines
  • Gearboxes
  • Transmission
  • Fuel injection systems
  • Steering systems 

Contact Bossard today to learn more about the Koenig Expander sealing plug. 


March 11, 2022
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Best Fasteners for Plastics and Composites: Threaded Inserts

When it comes to choosing the best fasteners for plastics and composite materials, you have a range of options. However, not all fastening solutions are suitable for every application.  And if you’re looking for the best fasteners for plastics and composites, the team at Bossard can help. 

Throughout the world, Bossard fasteners have become synonymous with exceptional quality, durability, and unrivaled performance. In addition to an expansive selection of fastening solutions, we offer Product Solutions and Assembly Technology Expert support as you work toward the best solution to your bolted joint problem. And if the ideal solution doesn’t exist, Bossard can create it. 

One of the top fastening solutions we offer for composites and plastics are threaded inserts. Also known as a threaded bushing, threaded inserts are fasteners that can be pressed-in, molded-in, or welded into a soft material to create permanent machine threads. Threaded inserts help prevent hardened fasteners from pulling out of softer composites, plastics, and soft metals. Because of these qualities threaded inserts are ideal for creating durable mechanical joints in your plastic and composite components. Let’s take a closer look at some of our top and most frequently utilized thread inserts. 

Types of Thread Inserts for Plastics and Composites

  1. The Tappex MULTISERT thread insert is a press-fitting insert that is made of brass. Available in M1.6 through M12, this threaded insert can be unheeded, with a large head diameter, or small head diameter. 
  2. The Tappex MICROBARB thread insert is a press-fitting fastener that has micro knurling for thin-walled materials. Made of brass, this threaded insert is available in M2 through M10. 
  3. Tappex TRISERT/TRISERT-3 are versatile, self-tapping inserts. They are available in brass, steel, and stainless steel in sizes ranging from M2 through M10. The TRISERT features three special cutting slots that prevent chips.
  4. Tappex FOAMSERT are self-tapping inserts that are ideal for wood, expanded materials, and soft plastics. These threaded insert are made from brass and are available in M2.5 through M8. 
  5. Tappex HiMOULD are threaded inserts designed for molding in. Manufactured from brass, these threaded inserts boast a highly-increased pull-out force by extra grooves from thread size M3. 
  6. PEM NFPC are threaded inserts for press-fitting. Manufactured from stainless steel, these inserts are available in M3 to M6. They feature high torsional strength through outer milling and a hexagonal head. 
  7. IN-STOP threaded inserts are made from brass and are designed to splay. These inserts can be set blindly without tools. 

Contact Bossard Today

At Bossard, we are proud to offer a solution to every fastening challenge. As industry leaders, countless customers have turned to Bossard for tailored solutions, premium quality products, and innovative services. 

Contact us today.





January 07, 2022
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