Fastener Technology

Fasteners for Composite Materials


Composite materials have become more popular to use in various projects because of their versatility. Composites are often lighter and stronger than traditional materials, so they are a go-to for projects. However, it can be a little more tricky to find fastening solutions for composite materials. Fasteners such as bigHead® and ecosyn®-BCT were created for more complex materials and situations like working with composite materials. Learn what bigHead® and ecosyn®-BCT can do for you.


These fasteners are made so any attachment points such as pins, nails, nuts, threads, hooks, etc. are attached to the head or base plate via a weld point. This construction allows bigHeads to be integrated into your project “invisibly.” It also means these fasteners don’t require holes in your composite materials, so your material can stay strong. These fasteners can either be embedded into the composites or surface-bonded to the composites so you don’t compromise the composite material itself.


ecosyn®-BCT rivet nuts have cross holes on the shank to determine where the rivet nut will collapse to allow it to be installed in non-conventional blind applications. ecosyn®-BCT rivet nuts give you a resilient connection because it applies minimal stress around the base material so there is no damage to your materials.

Both bigHead® and ecosyn®-BCT work hard on your tough projects. These fasteners were designed to help out on those projects that are hard to handle. Using these fasteners with composite materials will help you to have a strong, stable and resilient product.

To find out more about fasteners for composite materials, or to find out which fastener is perfect for your project, contact us at

April 14, 2017
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Fastening Solution for Extreme Heat: ecosyn®-MRX


In an ideal world, your product would exist in the perfect climate with no wind, water or extreme temperatures of any kind. You would also never have to deal with any type of corrosion or rust. In a perfect world, your product would withstand anything man or nature could throw at it.

This isn’t a perfect world, but at Bossard we work to improve it every day. We work to provide you with fastening solutions that better stand up to the elements and keep your product going stronger for longer. One of these fastening solutions is ecosyn®-MRX, and it was developed for many reasons, but one of these reasons was to withstand extreme heat.

Customer Problem: Extreme Heat

A Bossard customer in France develops fixing systems around the world. They needed a fastening solution for a tunnel renovation. We were asked to provide a solution that could withstand corrosion and heat in the case of extreme conditions like a tunnel fire.

Our Solution: ecosyn®-MRX

Our team came up with the solution of ecosyn®-MRX. This fastener is constructed with special martensitic, hardened and tempered chrome steel. This means it can resist at least six hours in extreme high temperature up to 1,200° C. ecosyn®-MRX can withstand those hot temperatures to get the job done.

Examples of application areas for ecosyn®-MRX:

  • General sheet metal construction
  • Heating and ventilation ducts
  • Appliances
  • Vehicle body construction
  • Facade constructions
  • Green houses

You can use this fastening solution for a variety of different applications because it offers you many benefits. However, if you are looking for a solution for heat resistance, ecosyn®-MRX is a great option for you. Contact us at if you have any questions!

March 31, 2017
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Methods for Calculating Appropriate Tightening Torque

When you are trying to determine the tightening torque you need for a fastener, there are a couple ways you will want to go about it. It may seem like a fairly easy answer, but that is not always the case.

Use a Torque Calculator

Using a torque calculator to determine the approximate tightening torque is a good place to start. This calculator will request information such as the coefficient of friction, the bolt strength and diameter. A torque calculator is a good way to get started and get an approximate tightening torque, however, it will not be exact in all situations. This is why after using a calculator, it is a good idea to perform some joint testing to verify your results.

Test Your Torque

Once you arrive at the proper torque requirement, you may want to test your torque values to verify the accuracy of your assembly tools. This is important because it helps you ensure the safety, reliability and quality of your project.

You will need a calibrated hand torque wrench to verify the tightening torque of your fasteners. You can select from the First Movement Test, the Loosening Test and the Marking Test as an indication of the applied torque:

  1. The First Movement Test will involve applying force to your torque wrench after the fastener has been tightened. You will do this until the first movement of the fastener is noted.
  2. The Loosening Test requires that you turn the fastener in the opposite direction to loosen it. You will record the torque when the fastener first breaks loose.
  3. For the Marking Test, you will need to mark the fastener and continue to mark onto the surface being clamped. Then you will loosen and retighten until the marks match up.

It is important to use the proper torque on your project to ensure safe, reliable joints. To learn more about torque and methods for measuring it, contact Bossard at

March 17, 2017
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Self-Tapping Screws for Plastic

self-tapping screws for plastic

Self-tapping screws are those that can form their own threads as they are driven into the material. Plastic requires a specially designed thread profile as tapping screws used with steel can result in residual stresses in the plastic that can degrade the structural integrity of the assembly. Plastic thread-forming screws give you more flexibility and quickly assemble components with fewer fasteners. When looking into self-tapping screws, the first step is to decide what type of self-tapping screws are best suited for the application. Thread-forming and thread-cutting are two categories self-tapping screws are classified into. Below is a brief description of each category.

Thread-Forming Screws

When you are using a thread-forming screw, you will get a very secure fit. Thread-forming screws produce little waste as the plastic that is displaced to create the thread relaxes back into the root of the thread. This attribute is one of the reasons why a thread-forming screw would be chosen over thread-cutting. Thread-forming screws, generally, function best in thermoplastics. This is due to the spring back function of the material to fill voids created by the screw.

Thread-Cutting Screws

These screws actually remove material because they have cutting edges. In general, thread-cutting screws can be used for both thermoplastics and thermosets without issue. Each application can result in a different screw being recommended, so a review of each application should be done. Thread-cutting screws have a smaller flank angle to reduce instillation torque while increasing surface area which results in a higher pullout force.

ecosyn®-plast is a great option for a thread-cutting screw for plastic. These screws are designed differently than tapping screws because they are designed to easily penetrate the material without causing stress to the material. Check out some advantages of ecosyn®-plast:

  • Low driving torque and high stripping torque
  • High breaking torque and tensile strength of screw
  • Excellent security against vibration
  • Low risk for cracking the base material
  • No setting of the assembly due to excessive relaxation of the plastic material

If you have questions about self-tapping screws for plastic or need help in deciding on a fastener, contact us at Our experts can help you get the materials you need for a successful project. We are also prepared to provide you with technical advice and we can even provide field-related assembly tests for you in our laboratory to help with application technique.

March 10, 2017
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Vibrational Loosening and Fastening Solutions

Vibrational Loosening

The environment your product is in is a huge factor in the success and sustainability of your project. Vibration is one factor that can cause your project to fail. This is because a bolted joint has the possibility of unintentional loosening or vibrational loosening that can cause fastener failure.

The good news is, we have anti-loosening and anti-vibration fastening solutions. Some of these solutions include: ecosyn®-fix screws, the Nord-Lock bolt securing system, and TufLok®. Check out the details on these product solutions below.

ecosyn®-fix screws
This screw is made to be shake and vibration resistant. ecosyn®-fix screws consist of a large washer that is integrated into the screw head. This surface is designed to help prevent unscrewing. These screws are used in many technical appliances and electrical equipment.

Nord-Lock bolt securing system
This securing system was designed to use tension to secure critical joints that are exposed to vibrations. The Nord-Lock bolt securing system blocks the rotation of the bolt/nut and maintains the clamp load. This can offer you a sense of safety and security on your bolted joints.

TufLok® is another solution for vibrational loosening. This is a system for thread locking and thread sealing fastened joints. This system uses an elastic, wear-resistant, blue nylon patch to seal and lock as fastener into place. This system is also resistant to many chemicals which makes it a great solution for many products.

Vibrational loosening is something you want to watch out for, but if you have the right fastening solutions, you don’t have to worry. We take pride in providing proven products to increase your productivity. If you have questions, contact us at

March 03, 2017
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Fastening Solutions for Automotive Applications

bigHead Bonding Fasteners

Fastening Solutions for Automotive Applications: bigHead Bonding Fasteners

When looking into a fastener, ultimately, you want one that is reliable, secure and it is efficient with your time. Solutions like bigHead have been developed to ensure you have a reliable fastener, even if it the situation isn’t as straightforward. Recently, there have been some changes in how the automotive industry has been building vehicles. These changes require better fastening solutions.

Changes in Building in the Automotive Industry

Like every industry, the automotive industry is always trying to improve the way they do things. For a while now, performance cars have used lightweight composite materials to improve performance in those vehicles.

Now, however, many high-end and luxury car manufacturers are looking to use those lighter materials as well. These luxury manufacturers want to reduce CO2 emissions, improve fuel efficiency and improve safety features. Decreasing the weight of these vehicles through composite materials will help achieve these ends.

To make this material change would mean to change production and assembly procedures. The only potential problem with this change is automakers finding the right fasteners to work with these composite materials, and a fastener that can keep up with quick assembly procedures. This is where bigHead comes in; these fasteners were designed to as a quick and easy solution for tough fastening applications.

Fastening Solutions like bigHead

bigHead has developed new production techniques to fit specifically with the changes in the automotive industry’s needs. The following are advantages of bigHead for the automotive industry.

  • bigHead fasteners can be securely and reliably bonded to CFRP panels with no special curing conditions.
  • Bonding times can be as little as 6 seconds or 15 seconds.
  • The results are completely invisible for the A-side panel with no holes or shadowing.
  • The bigHeads perforated head design allows adhesive to flow through the holes and firmly lock the fastener with high load distribution and excellent stability.
  • bigHead can be a highly precise application that doesn’t have to compromise the panel form or structural design.

These fastening solutions were created with automotive applications in mind. The needs of the automotive industry and automotive applications have been anticipated and bigHead provides the solutions. If you have questions about bigHead fastening solutions, reach out to us at

February 24, 2017
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What is Galling and How do you Prevent it?

preventing galling with bossard

By definition, galling is an interaction (usually negative) between two materials as they slide past each other. It is also known as cold welding which occurs frequently in mating threads of similar materials and surface conditions. Galling is most common with stainless steel fasteners, but can also occur with aluminum and titanium as well.

Prevention of galling simply involves changing the surface condition of one of the mating components. If dealing with aluminum, changing the alloy of one of the components is sometimes enough. Hardening to create a difference in the mating surfaces is another option. Lubricants are also good deterrents of galling.

However, there are several ways in which you can prevent or minimize galling. Check out the infographic below for those solutions.

top coats for preventing galling

Take some time to think about preventing galling when you are assembling your next project because it will save you time, effort, and money in the long run. In order to find out more about preventing galling, contact us at

February 10, 2017
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Blind Rivet Nuts for Lightweight Applications

blind rivet nuts

A blind rivet nut is known for its use in projects where you have only one-sided accessibility. This nut allows easy assembly when you don’t have access to multiple sides of your project. They can be used in a wide variety of projects and a variety of different industries.

There are very clear benefits to using blind rivet nuts, some of these include:

  • Simple blind installation
  • Fast assembly time
  • Low assembly costs
  • Close-to-edge application
  • A secure hold is provided
  • No surface damage

With the advantages of blind rivet nuts, it can be easy to see why they would be useful. They are particularly beneficial in lightweight applications that can only be accessed from one side. Blind rivet nuts are great for soft materials like plastic, fiber glass and aluminum. This is because blind rivet nuts are relatively soft, but they are great in those materials because they can fit snuggly and they have the strength to hold properly.

Some good projects to use blind rivet nuts include cabinets, pipes, benches, metal enclosures, heating installations, and air conditioning. Blind rivet nuts are also used in the automotive industry, the aerospace industry and many others. These fasteners are versatile and they carry a great number of benefits.

If you have questions about blind rivet nuts or how you can apply them to your next project, reach out to us at

February 03, 2017
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Is it Safe to Reuse Screws?

reuse screws

For many of us, the default is to try to reuse materials from previous projects to save on costs and because we already have those materials around. However, is it safe to reuse screws?

Check out this video for some quick rules on when you should or should not reuse screws:

As the video said, do NOT reuse screws if

  • They have exceeded the yield point
  • They have wear and tear from external loads
  • They will be used in critical applications

You can reuse screws, but if you are worried about the integrity of the screw, it might be best to get new fasteners.

If you have a specific question about a project or situation, reach out to us and we can give you the benefit of our expertise. Contact us at with any questions or concerns about fastener reuse!

January 27, 2017
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Surface Bonding Solutions by bigHead®

surface bonding solutions

If you are in a situation where you cannot allow your fastener to be embedded, a surface bonding fastener is the way to go. There are many options for surface bonding fasteners created by bigHead®. This can be an effective and also discrete solution that will allow you to keep the structural integrity of your product.

How Surface Bonding with bigHead® Fasteners Works

Your bigHead® fasteners are discrete and strong. How do they work? They are surface bonded with a structural adhesive. This gives you the fastener where you need it, and it makes it completely invisible from the other side. You will have no rivets, drill holes or visible shadows from surface bonding the bigHead®.

This fastener is designed with a perforated head, so the glue can flow through the holes and lock it into position. There are a wide range of designs and sizes available as standard or custom made for specific applications.

Benefits of Surface Bonding with bigHead®

Benefits of surface bonding with bigHead® are numerous and include:

  • Discreetness because the fastener will not be visible from the other side
  • No holes in the material so you can keep the structural integrity
  • No loosening or rattling of the fastener through vibration
  • Optimal design because the fastener can be designed specifically for the application
  • Easy to apply with no specialized tools required
  • Optimal tensile and torsional loading, depending on the head design and adhesive used

There are a lot of reasons to choose surface bonding with bigHead®. This is a great fastening solution if you need something more discrete or if your project is working with composite materials. If you have questions about surface bonding or any other type of fastening solution, contact us at Happy fastening!

January 20, 2017
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