Fastener Technology

How to Change the Mandrel and Nosepiece for the Prosert XTN20 Tool

Mandrel and nosepieces

The ProSert XTN20 has proven itself as a capable blind rivet nut tool because of its light weight, high speed, good ergonomics, long endurance, and flexibility in pull-to-stroke and pull-to-force modes. These factors add up to higher productivity and low installation cost for each fastener.

The tool includes multiple high-strength installation mandrels that install quickly and easily as explained by these steps in the following video.

  • First, use a spanner wrench of the correct size to release the torque on both the lock nut and nose casing. You can then manually loosen and remove both the nose piece and the nose casing to reveal the mandrel.
  • To release the mandrel, pull the nose pin away from the chuck nut and set it in the L groove. You can then manually loosen and remove the chuck nut as well as the mandrel.
  • You can then reverse the process to install a new mandrel with a different size, the nose casing, and the nose piece.

Finally, adjust one of the following elements, depending on how you are setting the rivet nut.

  • Stroke distance. Slide open the red sleeve in the back of the tool and then use the pin-push tool to adjust the silver dial for the minimum and maximum stroke length.
  • Pressure. Push the silver button by the red knob and then turn the knob clockwise to increase pressure or counterclockwise to decrease the pressure.

Need more information on how to use different tools to install specific fasteners? Then please contact Bossard today at

November 08, 2019
Read More

All About Rivet Nut Tooling

A rivet nut tool.

As part of our commitment to adding value by delivering solutions to improve your productivity, this video introduces the rivet nut tool. Bossard’s North American Product Manager for Riveting and Clinching Technology demonstrates the advantages and use of this smart tool. This tool represents one of a series that includes tools for blind or POP® rivets, and torque drivers. All these tools operate on battery power to free you from cords and air hoses. This energy source lets you set up to 3,000 M6 rivet nuts on one charge. This rivet nut tool also operates faster than its air-hose counterpart. This can make a difference in productivity over many assemblies.

The smarts of the rivet nut tool come from its ability to track its use. It integrates a sensor that measures the force used to set each rivet nut with an accuracy of at least 99 percent. You can immediately check a green screen on the back of the tool to verify that the setting was successful.

Monitoring results displayed on a force-over-stroke curve is an option. Because you can program the tool with the included software, you can view and set acceptable limits for the tool. Those values are then assigned to an assembly serial number. Integrating an optional bar code scanner into the tool to read the number is possible. Several programs are then read into the tool and performed on the same workstation. An optional WiFi module can send data to a quality documentation computer without having to use cables and plugs.

 For more information, please contact us at today.

November 01, 2019
Read More

Quick Guide to Process Monitoring Tooling

A man uses a tool to fasten a rivet

How do you know if the fastener you installed is tensioned to its specifications? How can you be sure that your line operators are installing the correct number of fasteners in the correct locations? If you are using a standard tool, you have no way of knowing for sure.

Smart Tools

That’s why Bossard offers several different “Smart Tools” with process monitoring capabilities. Tooling options exist for torque guns, blind rivets, blind rivet nuts, and lock bolts. Data from these tools is stored as either a torque/angle curve for torque guns or a force/stroke curve for riveting fasteners. Each type of tool functions slightly differently, but all can be outfitted with optional upgrades, such as a barcode scanner that allows the tool to associate a specific workpiece serial number with one or several completed fastener installations.

One tool can store many different programs and can install several different parts without the need for recalibration or adjustment of settings. For example, one Smart Tool for blind rivets can install three different rivets of the same diameter in succession without needing to adjust stroke distance or pulling force each time.

All tools are programmable and come with software to customize settings for any job, allowing a programmer to set OK/NOK limits on the measured quantities. OK readings from the tool will present the operator with a positive confirmation. NOK readings will present a notification that can be cleared by someone with the proper permissions – whether that is the operator, or a quality manager depends on the factory’s individual preferences.

The process monitoring function does not slow down tool cycle time, and Smart Tools outperform many standard tools in side-by-side speed tests.

For more information on how process monitoring can improve your quality assurance methods, contact Bossard today at

October 25, 2019
Read More

Everything You Need to Know About Inch and Metric Fastener Standards

A secure fastener from Bossard

Many standards exist relating to fasteners that detail geometry, mechanical properties, and finishes. At times, differentiating between these variations can be difficult. Below are a few of the most common standards for both inch fasteners and metric fasteners:

Inch Fasteners

Fastener Dimensions Mechanical & Material Properties
Hex head cap screws ANSI/ASME B18.2.1 SAE J429
Hex nuts ANSI/ASME B18.2.2 SAE J995
Hardened steel washers ASTM F436 ASTM F436
Unhardened steel washers ASTM F844 ASTM F844

Metric Fasteners

Fastener Dimensions Mechanical & Material Properties
Hex head cap screws ISO 4014/ISO 4017 ISO 898-1
Hex nuts ISO 4032 ISO 898-2
Hardened steel washers ISO 7089 ISO 7089
Unhardened steel washers ISO 7091 ISO 7091

Most inch fastener standards have only one standard which governs dimensional characteristics of a part, but metric fasteners may have many standards. These standards are often the same, with a few notable exceptions:


Fastener Preferred Standard Standard option 2 Standard option 3 Difference
Hex head cap screws ISO 4014 ANSI/ASME B18.2.3.1M DIN 931 Width Across Flats (WAF) is larger on select sizes for DIN fasteners
Hex nuts ISO 4032 ASME B18.2.2M DIN 934 The thickness of DIN nuts is slightly lower

For metric fasteners, we recommend using ISO standards as they are the most recognized and used all over the world. Some catalogs still list DIN standard parts even though the DIN standard may be obsolete, and parts are still made to these obsolete standards. If you have any questions on which standard part is right for your build, contact us at for more information.

October 11, 2019
Read More

FASTEKS Access Line: Everything You Need to Know About Our Access Hardware Products

Bossard's FASTEKS products

You know Bossard for the fastening products we offer to improve your products. Yet, this forms just one part of our methodology, designed to make your manufacturing and supply chain smarter, leaner, and more efficient. Our latest offering is a special catalog of around 5,000 operating and control elements, excerpted from our larger collection. They consist of the following categories.

Catalog Categories

  • Handwheels and Handles enable manual adjustments to machinery and manage access to compartments. They include solid handwheels with fixed or fold-away cylindrical handles and no handles. They also cover crank handles with fixed and fold-away cylindrical handles.
  • Clamping Knobs help with gripping and securing applications, and typically contain knurling, texturing, or lobes. They are available as both nuts or screws in three-star, star, cross, wing, grip, and knurled varieties.
  • Clamping and Tension Levers allow for manually fixing or holding elements. They may have adjustable handles and may or may not require the push of a button to release tension.
  • Handles improve grip on machinery for easier movement or adjustment. They include bridge handles with an ergonomically perfect design, T-handles, mushroom knobs, plain spherical knobs, cylindrical knobs, cylindrical handles that are fixed or revolving, and retractable cylindrical handles.
  • Control Elements allow the adjustment of equipment functions with knurling to improve grip and numbered dividing marks to show gradations of control.
  • Leveling Elements help stabilize machinery on uneven surfaces. They may be adjustable or rigid and may or may not include rubber inserts that prevent slipping.
  • Indexing and Positioning Elements help you to remove or re-position elements quickly. They include spring and lateral plungers, ball-ended thrust screws, index plungers, ball-lock pins, and indexing handles.
  • Hinges enable lids, doors, or other moving objects to open or close. They include free-swinging versions with through holes, threaded inserts, or threaded studs.

This list represents only our standard range of access hardware products. We can deliver over 10,000 customized solutions based on your specifications and drawings, or that are jointly developed by your engineers and our product specialists. For more information, please reach out to your local Bossard contact.

October 04, 2019
Read More

What to Look Forward to With Self-Tapping Screws

A self-tapping screw

Productivity is everything in your operations. So, it only makes sense that you choose fasteners that will support your efforts to save time while still focusing on quality. At Bossard, we have the solution in the form of self-tapping screws.

Save on the Process

When you’re working with wood, plastic, or metal, you typically must drill a pilot hole before using a screw. This means that you have to change the bit on your screwdriver at least twice if not three times because of gaging the size.

With a self-tapping screw, you save time. This is because they drive their own hole. All you need is a screwdriver and the self-tapping screws. You can create perfectly fitted threads just like that.

Ideal in So Many Scenarios

You will find that self-tapping screws are great for use in a variety of scenarios. Particularly when you are fastening two materials together, you can use these.

You can choose the type of screw tip that works best for the scenario, too, including:

  • Blunt 
  • Flat
  • Sharp 
  • Piercing

Once you identify the type of tip that you need, the rest is, as they say, history.

Of course, there are a few things to know when you’re dealing with self-tapping screws. If you ever need to disassemble the application, stripping the screws is possible. When you reassemble, you would need a slightly larger screw. To avoid stripping, use a metal insert from the very beginning. This may be necessary if you plan on disassembling and assembling at any point in the life of your application.

Shop for What You Need

At Bossard, we have a wide array of self-tapping screws that you need to boost productivity and get the job done. These screws come in a variety of shapes and sizes like all the traditional screws you use.

The only difference is, when you begin using these, you’ll see that the time to get the job done decreases, as do labor costs.

For more information on self-tapping screws, contact us at

September 13, 2019
Read More

How to Meet Top Quality Standards with Bossard Expert Test Services

Expert Test Service

Meeting top quality standards, especially in fastening technology, requires thorough testing of your prototype or products. Bossard provides Expert Test Services at one of our 14 accredited testing laboratories around the world that meet ISO/IEC 17025 certification. The following tests are available.

Available Testing

  • Coating Thickness Measurement – measures thickness through X-rays to verify the required protective coating.
  • Corrosion Analysis – looks at the type of corrosion that may appear on your components and develops countermeasures to reduce it.
  • Failure Analysis – determines why a bolted joint fails, such as corrosion, change of friction conditions, or incorrect tightening torque.
  • Fastening Optimization – helps you choose the right fastener for your application and provides specifications if desired.
  • Friction Coefficient Testing / Torsion Testing – determines the friction coefficient, tightening torque, and clamp force of your bolted joint.
  • Hardness Tests / Hardness Profile Measurements – uses measure indentations to test surface hardness, core hardness, case hardness, hardness profile, and other mechanical properties.
  • Joint Design Calculation – discovers what loads and stresses a critical bolted joint undergoes. We can then recommend how to optimize the joint during design and assembly.
  • Loosening Analysis – determines if you are using the right clamping force for highly loaded bolted joints. It considers the temperature of use, vibration, and forces to transmit, among other factors.
  • Salt Spray Test – examines how a spray of a saline solution affects various coatings created to prevent corrosion. The test may last up to 1,000 hours.
  • Spectral Analysis – identifies a wide range of materials using, for example, such ranges of 31 different elements for iron and 21 different elements for nickel
  • Tensile and Compression Strength Testing – calculates yield point, elongation at fracture, tensile strength and other mechanical characteristics.
  • Torque Analysis – tested in our labs or at your location on original working pieces made from metal or plastic. It gauges the tightening torque of your application.
  • Ultra-Sonic Preload Measuring – evaluates how the length of a screw changes when tightened (pre-load). You can measure ultra-sonic preload with your application at your location.

For more information about our Expert Test Services, please contact us at

August 23, 2019
Read More

Discover the Unexpected Potential of Your Products with Bossard Expert Teardown

Bossard Expert Teardown

With the capacity to analyze your current processes and improve the design of reliable products, Assembly Technology Expert (ATE) services seem ideal for prototyping or the creation of new products. But what if you want to improve a product that already exists or your current use of fasteners? That’s where Expert Teardown comes in.

What Is Expert Teardown?

As its name explains, Expert Teardown disassembles your pre-existing product to discover how it uses its current parts and fasteners. Our engineering specialists look at every inch of the detached components to understand how they function alone and as a part of the whole, and how they advance relevant operating requirements and standards. Our staff can then come up with ways to improve reliability and quality while saving you time and money.

Some of the benefits of Expert Teardown include optimized process flow, increased efficiency with reduced complexity, a safer design, and lower total costs.


Expert Teardown is available in three packages.

  • Basic. This package focuses on Analysis, which looks at fastener use and assembly into the final product. Improvement potentials and tentative cost savings may arise.
  • Advanced. By building on the findings of the Basic package, this option emphasizes the Verification of processes, estimated costs, and projected results. Bossard will confirm recommended solutions on- and off-site before presenting them in a technical report. Physical examples are also shown.
  • Superior. After the groundwork laid by the Basic (Analysis) and Advanced (Verification) packages, implementation can proceed. It starts with detailed design specifications and thorough documentation of new assembly procedures. Bossard completes assembly and usage instructions. After reviewing the results, training in the new implementation proceeds on- and off-site.

If you want to find out how Expert Teardown can affect your particular product, please contact us at

August 09, 2019
Read More

Learn More About Assembly Technology with Bossard Expert Education

Bossard Expert Education

Although fasteners may form a small part of your manufacturing process, their successful use has a big effect on how your product hangs together in your customer’s eyes. Learn all that you can about fastening technology through Expert Education, a major part of our Assembly Technology Expert services. We customize our training sessions to your application and business.


The following are some of the training formats available:

  • Seminars. Our live seminars combine both lectures on theory and practical workshops to teach fastening topics. You can join scheduled public sessions or have us develop a customized seminar for your employees held at your location.
  • Webinars. This option maximizes convenience by giving you short learning sequences that you can view at your desk or home when you have free time.
  • E-Learning. We’ve developed an Internet-based platform that allows you to go through a wide range of fastening information by self-studying at your own pace.


While we can cover any fastener information during our sessions, the following are some of our most popular topics. They are available both as public seminars or personalized to your needs.

  • Basic Introduction to Fasteners. All about fastening elements and how to choose the best ones. Why do DIN, ISO, and A2 matter?
  • Technical Introduction to Fasteners. How bolted joints work and how they’re affected by assembly tooling. Discover the mechanical properties of fasteners, how to prevent corrosion, and how multinational fasteners affect costs.
  • Securely Fastened Joints. Designing and defining a bolted joint to optimize quality and lower the Total Cost of Ownership.
  • Corrosion. Reducing or avoiding corrosion on any joint with the correct materials, design, and coatings.
  • Cost Savings. How to save on costs by up to 40 percent by choosing the right fastener.

The following seminars cover the qualifications needs of those involved in fastening technology, according to VDI/VDE 2637 standards.

  • Technical Fastening Competence. Guidelines and standards for the use of fasteners and components.
  • Design of Bolted Joints. How to design joints and choose fasteners for the best tightening methods.
  • Calculation of Bolted Joints. Calculating bolted joints and selecting the correct fasteners for tightening.
  • Innovative Assembly. Evaluating and standardizing tooling used for tightening.

Find out more about our Expert Education options by contacting Bossard at

August 02, 2019
Read More

Optimize Your Assembly with Bossard Expert Walk

Optimize Your Assembly

Our Assembly Technology Expert (ATE) services aim to make your company more competitive by maximizing your use of fasteners and reducing the time to market of any products that depend on them. Derived from the well-known industry techniques Gemba-Walk, Walk-the-Line, and more, Expert Walk is one of the more extensive ATE methodologies.

Together with one or more of your engineers and front-line workers, a Bossard team member walks through your entire manufacturing process to discover what happens during production. As we inspect your assembly lines and workstations, we focus on fastening technologies and how to optimize their processes and tools.


Optimizing how fasteners integrate into your process can lead to time and cost savings when it delivers better products and eliminates waste. Quality goes up when you use the right fasteners and look at more efficient ways to assemble your product. Your productivity goes up even as the cost of production goes down.


To give you the best results, you can choose from three Expert Walk packages that offer different combinations of Analysis, Verification, and Implementation.

  • Basic. This initial package focuses on Analysis. Bossard examines your entire production line is to verify assembly processes and technology, particularly when they involve fasteners. We estimate the potential cost savings of any improvements based on the Total Cost of Ownership, which combines the cost of quality, service, delivery, and price.
  • Advanced. Building on the Basic foundation, this package continues with Verification. It proves that technical improvements are possible while recommending proposals for new and proven solutions. We present a report about these proposals and provide physical examples.
  • Superior. Starting with Basic and Advanced services, this package proceeds with Implementation. It develops a plan with a project team that prioritizes goals. We lead the R&D team during implementation of the proposals, review the results, and lead training both on- and off-site.

Our Expert Walk can be the first step to developing the best solutions for your fastening challenges. Please contact Bossard today at to discover how this method can work for your company.

July 26, 2019
Read More