Guaranteed quality with
test certificates for screws
Screws needed for complex requirements have to comply with guaranteed strength parameters. This is because planners, architects and engineers need guaranteed parameters so that they can identify which screws meet all the construction requirements.
For non-standard screws, it is the test certificate for a screw that delivers all these values. It certifies to the user that the connecting elements supplied meet the defined requirements. For screws made of special materials, it is the test certificate for the screw in particular that is referred with preference since it ensures compliance with the properties required.
Various test documents available
As a service, we provide our customers with test reports for mechanical fasteners pursuant to ISO 16228 at short notice.
The following types are available:
Declaration of compliance for mechanical fasteners F2.1:
With this declaration, the manufacturer or distributor confirms that the delivered fasteners are in compliance with the relevant standards and/or specified requirements. Inspection results are not part of this certificate.
Test report for mechanical fasteners F2.2:
With this report, the manufacturer confirms that the fasteners are in compliance with the relevant standards and/or defined requirements. This is documented with test results from the ongoing production, but not from the delivered batch (non-specific inspection).
Test report for mechanical fasteners F3.1:
With this declaration, the manufacturer or distributor confirms that the delivered fasteners are in compliance with the relevant standards and/or specified requirements. The test results are based on inspections from test samples from the delivered batch.
Test report for mechanical fasteners F3.2:
The same as for the test report for mechanical fasteners F3.1, the test samples are taken from the order. However, instead of a representative authorized by the manufacturer, an independent laboratory that has been accredited pursuant to ISO 17025 performs the tests.
In addition to the aforementioned test reports pursuant to ISO 16228, we gladly provide you with our comprehensive know-how in the form of the following report types:
We can determine the composition of any connecting element in our laboratory and identify it by means of a test certificate. The analysis is carried out on an XRF spectrometer (X-ray fluorescence analysis).
Initial sample test report (ISTR):
We can prepare an ISTR for the screw connections on your behalf prior to the start of series production. This allows you to demonstrate the high-quality standard of the product to your customer.
Technical test report:
In the case of technical test reports, we record the results of complaints that have been reviewed and make them available to you.
Declaration of performance for approved products (CE/ETA):
The manufacturers of building inspectorate approved products certify the essential characteristics and data for these products with the declaration of performance. Approval can be carried out according to CE or ETA standards. We have all declarations of performance available for download.
This is because they are based on random samples of the current batch for delivery and therefore offer maximum safety.
Since we attach great importance to the quality of our products, we carry out regular tests on out screws over and above the tests listed here.
This includes 3D measurements, dimensional tests and optical measurements using a measuring microscope.