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UNI EN 9001:2015

Since 2017, Bulloneria Gheza srl’s quality management system has been certified in compliance with the international standard ISO 9001:2015. For us, quality, research, development, and continuous innovation in respect to environmental sustainability are a constant challenge. Our products are always accompanied by the following certificates:


Certificate of
steel mill of the raw material used


Certificate of
heat treatment


Certificate of
to order

All screws are manufactured following a predefined production process that allows:

  • Processing traceability

    cutting, stamping, turning, threading and various

  • Traceability of raw materials

    quality, Ø sampling, casting, supplier

  • Packaging, quantity and shipping reference DDT

Per customer request, it’s possible to acquire:

  • Coating certificate

    if different from the remediation treatment

  • Test certificate

    relating to the mechanical characteristics of the piece (external institutes)


Bulloneria Gheza srl ​​has in its control laboratory numerous verification instruments, hardness testers, plugs, rings, gauges, calibration blocks, RT-25 handheld roughness tester and three pyrometers installed in the molding department.
All obviously maintained according to strict certification procedures.