Fastener Technology

You may have heard of the ecosyn®-fix screws and their reliability and efficiency. Now let’s dive a little deeper into their functionality.

ecosyn®-fix combines a screw, a helical spring and a flat washer all into one fastening solution. This allows for it to achieve increased functionality and have many different applications. For example, the large diameter of the integrated washer is beneficial because it helps compensate for large tolerances. The integrated washer also minimizes pre-load loss. The reason the wide, smooth bearing area is beneficial is because it reduces the risk of damage to surface components, and it minimizes potential for corrosion.

The ecosyn®-fix screw has many applications because of its increased functionality. Some specific uses of ecosyn®-fix screws include:

• Railway vehicles (e.g. covers, fittings)
• System and apparatus engineering
• Electronics and electronic appliances
• Household appliances
• Vehicle construction
• Body and sheet metal applications

The ecosyn®-fix screw is proven to be productive, but what does that really mean? It means this fastening solution works and works well. It also means it improves your productivity and competitiveness. The ecosyn®-fix screw functions the way you need it to and it saves you time and money.

If you have any further questions about the ecosyn®-fix screw contact us at ProvenProductivity@bossard.com. The proof is in the productivity, but you have to start by trying the product.

There are many factors to consider when determining what kind of fastener you want to use in a project. Recently, there has been a desire to make products lighter, and the type of fastener can play a key role in the weight of a product. That is one of the reasons why ecosyn®-plast is a good fastening option.

You may think that ecosyn®-plast is only used for thermoplastics, but that does not necessarily have to be the case. ecosyn®-plast screws were created through the experience in thermoplastic screwing, but they have many advantages for applications outside of thermoplastic screwing as well.

Check out some of the benefits of ecosyn®-plast fasteners:

• High durability of screw joints under various conditions in different thermoplastic applications
• Optimized thread geometry for low stress generation in joints
• Self-locking, no additional locking elements are needed
• High generation of preload
• High breaking torque and tensile strength of screw
• High safety during assembly secured via low installation torque and high stripping torque
• Minimized loss of preload secured via enlarged area of contact surface under head

When working with thermoplastic elements, or when looking for a fastener of a lighter weight, the advantages of using ecosyn®-plast screws are clear. For more information about the thread geometry of ecosyn®-plast screws or for more construction or assembly notes, contact Bossard at ProvenProductivity@bossard.com.

If you have used Bossard products, you can observe their quality and high standards. However, if you have never used them before, you might be wondering how well they hold up. Recently, bigHead® has been EN 1090-1 certified. This really proves that our products are quality.

The EN 1090 certifications are a European standard that was developed in order to regulate the creation and assembly of steel and aluminum structures. The EN 1090-1 specifically deals with the requirements for conformity assessment for structural components.

A Conformity Assessment Body specialist certified the Factory Production Control (FPC) so that the bigHead® can be given the CE certificate of conformity.

bigHead® fasteners have many different versions. They are available in over 400 standard versions to increase versatility and range for use in many types of projects. These fastening solutions can also be used in a variety of industries including but not limited to automotive, marine and mechanical engineering.

Using a bigHead® can allow your fastener to be integrated “invisibly” into many plastic components and composites. They also improve upon conventional fasteners because they don’t require holes that could impair the component strength. bigHead® fasteners are also now EN 1090-1 certified, so you can rest assured that your project will get done well!

Would you like more information about bigHead® and its certification? Find more information here. If you have any questions, contact us at ProvenProductivity@bossard.com.

There are a lot of factors that go into the surface pressure under the screw head in soft materials. Some of these do effect the production process, the alignment of fibers in the material and the surface finishing and temperature changes.

Because there are a lot of factors, it is not possible to precisely define the permissible surface pressure for a particular type of material used to make a component, but there are some things that you can do to the screw design to help reduce the surface pressure.

The following can be used to reduce the surface pressure:

• Use of flange screws and flange nuts
• Chamfered holes (field investigations have shown up to a 20% increase in permissible surface pressure)
• Select a fine hole-through hole to ISO 273

Flange nuts and flange screws have been shown to reduce the surface pressure. Check out some of the advantages below!

Advantages of flange screws and flange nuts:

• Less intrusion
• Clamping force in the fastening during mounting tends to remain stable
• Flange products are more economic than large washers under normal screws and nuts (fewer fastening elements and quicker assembly).
• Flange screws and nuts allow greater hole tolerances and so are more economically efficient
• Flange nuts have a better stability against shaking than normal screws and nuts

For more information, or if you have any more questions, contact us at ProvenProductivity@bossard.com.

There are a lot of technical terms we throw around when it comes to the quality of screws and making sure they hold up. We have defined a few below so you know what factors to look for when fastening together your next project.

Tensile Strength
This is how much axial load a screw can withstand without breaking.

Yield Strength
Yield strength is the amount of resistance of a material to plastic deformation, so it determines how much stress a screw must withstand with the bolt being permanently elongated.

Proof Strength
Proof Load is the amount of resistance of a material to plastic deformation, so it determines how much stress a screw must withstand without being permanently elongated.

Tensile Strength under Wedge Loading
Bolts and screws are subject to the wedge test to measure ductility and head integrity. The test is performed by placing a wedge below the screw head and the screw must break in the thread or in the shank.

Head Soundness
The screw head must not have signs of cracking after being formed being cold formed.

Hardness
There are different tests for hardness like Vickers hardness, Brinell hardness or Rockwell hardness, but they all measure the resistance of the material to penetration by a test body.

Notch Impact Strength
This is the impact energy consumed during notch impact testing. Testing gives information on micro-structure, steel making process, inclusion content and more.

Surface Flaws
Surface defects can be multiple things. They can arise in the semi-finished product and those would be called slag inclusions, material folds and die marks. Also there could be cracks or crystalline breaks without inclusion of foreign materials.

Decarburization
This is the loss of carbon at the surface of ferrous materials.

We hope these definitions helped you learn a little bit more about the technical terms that can be thrown around in different projects. If you have any questions, contact us at ProvenProductivity@bossard.com.

BCT® stands for Bulge Control Technology. The idea behind this is a new construction of rivet nuts that better fit where you need them. BCT® has four cross holes on the shank, so it can control where the bulge starts to form. This allows for the best fitting into irregular holes.

The BCT®* Multigrip is a type of BCT® rivet nut. The Multigrip gives you a grip range that is much better than standard rivet nuts. In fact, the grip range is almost three times of a standard rivet nut. This allows one rivet nut to cover different grip ranges.

The importance of that lies with the cost savings and flexibility. The BCT® Multigrip can be used in applications where you would normally need several rivet nut sizes because of different material thicknesses. With the BCT® Multigrip, you don’t need all those other sizes; you can have a reduced rivet nut inventory which is more cost-effective for you. You can also have more design flexibility with the BCT® Multigrip because you won’t be forced into one thickness.

What is the best kind of application to use BCT® Multigrip? Well, these rivet nuts have controlled deformation of the bulge, so they can be used in many materials. They are ideal for application on thin materials or brittle and soft materials like plastic, rubber and composites.

With Bossard, you know it works well and hard for you. If you have questions specific to your project and how BCT® Multigrip can benefit you, contact us at ProvenProductivity@bossard.com.

*BCT is a registered trademark owned by BBA srl Italy

When choosing a fastener, it is important to look at the material of the fastener as well as what you are trying to fasten. This is important because you have to consider factors like the material strength, brittleness, and corrosion resistance.

Sometimes the strongest products seem small and simple, but they will do the job in the best way possible. The BCT®* rivet nut is a fastener that can be simple, but it does the job it needs to do and it is stronger than the competition. BCT® thrives in tough situations.

BCT stands for Bulge Control Technology and this technology gives you a high performance fastener solution. BCT® has four cross holes on the shank, which determines where the rivet nut will collapse allowing it to be installed in many non-conventional blind applications. The BCT® provides a strong thread compared to other rivet nuts.

BCT® is also easily assembled into hard to access structures. They can be assembled in virtually any material, like ultra-high strength steel, which is what makes them so impressive. They are blind rivet nuts of a high-grade material which makes them able to withstand a lot. If you are unsure of the material thickness or the material thickness varies, that is also a good reason to use the BCT® because it covers a very wide grip range.

With Bossard Proven Productivity, we ensure that your BCT® blind rivet nut will be safe and reliable, just like our other products. We would love to hear from you! Contact us at ProvenProductivity@bossard.com with inquiries and comments about our quality products.

*BCT® is a registered trademark owned by BBA srl Italy