Monitoring operations, whether purely documentary or carried out directly on the product, are an integral part of our workflow.

Nos équipes de production et de contrôle qualité les réalisent par prélèvement dont les fréquences sont définies à minima par les normes, ou suivant vos exigences particulières.

Our production and quality control teams perform these operations via sampling, with the frequency of testing being defined at the very least by current standards, or in accordance with your particular requirements.

To do this, we are equipped with monitoring systems whose metrological capabilities are periodically verified by an independent COFRAC organization. All metrological monitoring reports and certificates are openly available for you to look at on site.

We are able to provide you with the results of the following inspections and tests:

Control: Dimensional, visual and functional

Non-destructive test:

  • Video
  • Ultrasound
  • Penetrant
  • Spectrometry*
  • Treatment thickness
  • Dimensional
  • Visual
  • Functional

Destructive test:

  • Tensile test (ambient and hot up to 500°C)*
  • Proof load (on screw, stud, threaded rod and nut)*
  • Impact bending (ambient and cold up to -101° C)*
  • Hardness (Brinell, Vickers, Rockwell)*
  • Micrography and macrography
  • Salt spray

*COFRAC tests


Your expert in bespoke fasteners, hot forged screws, special studs and threaded rods.


  • E-maildeltametal
  • Phone +332 54 21 25 97
  • Z.I Jean-Bonnefond - 36100 ISSOUDUN - FRANCE