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For fasteners, less is not more...

One of the most famous pioneers in modern architectural history is Ludwig Mies van der Rohe, who is best known for his frequently cited phrase, “Less is more.” With that idea in mind, countless designers have created greatly influential products, such as the iPhone or IKEA’s innovative furniture. Yet, "less" is not necessarily always "more," as in the case of fasteners.

When seeking fasteners, quality is the top priority. A confirmation of this quality naturally stands or falls with the materials.

In order to provide the best possible service, we want to always offer the best quality. Our Fabory Quality Control and Sourcing Teams therefore regularly conduct research into our own products and those of our competitors.

In a number of tests that we recently performed on several sizes of threaded ends, we came across some shocking results in the samples of our competitors.

DescriptionM8x1.0 4.8 ZPLM10x1.0 4.8 ZPLM12x1.0 8.8 ZPL
Top cornerNot OK
(specification: 60°, measured: 29°)
Not OK
(specification: 60°, measured: 30°)
OK
(specification: 60°, measured:  60°)
Breaking powerNot OKNot OKOK
HardnessOKOKNot OK
Metallography – edge decarbonation --Not OK
 
The test results reveal that the products do not meet the tensile strength, hardness and edge decontamination requirements. In addition to these tests, we found two products in class 4.8 with severe deviations of the thread angle compared to the standard (top angle = 60°). For a clearer impression, see the images from the lab below. 

 Sample M8 threaded end (thread angle = 29°).

 Sample M10 thread end (top angle = 30°).

Compare the thread in the above image with the image below. Metric threads must always have an upper angle of 60°, as shown in the sample below:

Sample M12 threaded end with correct top angle (60°).

The manufacturing of threaded ends that do not meet requirements is often done to save on production costs. On the basis of a rough calculation, it can be said that, depending on the thread diameter, producers can achieve an average cost saving (or weight reduction) of 1% per top angle degree under the required 60°. For example, a thread angle of 50° results in roughly 10% less weight and the same percentage in cost savings compared to rods with the required angle. From a production perspective, the process of making threaded ends is relatively simple. The production costs mainly depend on the costs of raw materials, which is the primary reason why so many of these products put on the market do not meet the requirements.

This type of non-compliant threaded end carries very high risks for end users. The analysis by Fabory Technology concludes that, among other dangers, the following problems can arise when using threaded ends that do not meet the requirements:

  • The thread may strip during assembly, which can injure the technician.
  • The thread may strip during use, perhaps with a sudden load increase, which can cause the construction to collapse.
  • The nut thread can strip off, due to an incorrect transfer of force from the threaded end to the nut.

In order to always provide high-quality fasteners, we continue to extensively test our products and comprehensively screen our suppliers. More information about the quality of our products can be found throughout the Knowledge Center, and of course please feel free to get in touch with your contact person or our sales department.