Producers of washers and safety pillars for over seventy years

Founded in 1950, Growermetal is one of the world’s leading manufacturers of security washers, blanked parts according to customer’s specification and railway washers.

Since its establishment, Growermetal maintained its independence and has been run by the Cattaneo family, and it is now run by the second generation of entrepreneurs.


Your quality needs at the center of our research

The attention to small details leads us to develop big projects. Every single step we make starts from a specific request: that of our customers. This is the real driving force behind our ambition to improve our products and build relationships based on trust.

Growermetal is able to offer high quality products and services suitable to the requests of the European and international markets, with certified processes according to IATF 16949, ISO 9001, ISO 14001 and EN 9100.

Excellence knows no boundaries

From our headquarter in Calco, 40 km from Milan, we have grown to become a global benchmark in the production of spring washers and blanked parts. Through innovation, technology and customization, we continue to transmit and spread to the world the vision and values of our founder Virginio Cattaneo.



Year of foundation
45.000 m<sup>2</sup>

45.000 m2

Complete area



Our values


We care about our colleagues, suppliers and clients’ needs and we work in accordance with regulations, respecting the environment and following our code of ethics, to ensure safe and effective working.


Whether as a company or as individuals, we are aware that every action, choice and investment of time or resources leads to specific results. Our commitment is to pursue the best ones, with responsibility.

Respect for the Environment

We believe that an eco-friendly approach is essential for the future of the company. Through the Greenmetal project, we are engaged in promoting sustainable development, reducing energy consumption and waste production.


Know-how and research are the keys to improvement. Designing and producing innovative products and production, organization and management systems is what allows us to achieve highest goals.


Good communication makes work easier. Therefore, we pay great attention to provide accurate, clear and objective information, establishing constructive relationships inside and outside the company.


Fostering an attitude of collaboration, sharing knowledge, goals and information in a good working environment, contributes to better results. Working together multiplies success.


Training is essential to the success of a business. This is why we keep learning and specializing, in order to create opportunities for professional growth.


Having a complete and objective view of events, we are able to anticipate, mitigate and avoid problems, when necessary. A guarantee for us and our customers.

Our Mission

We produce and sell washers and stamped parts of excellence quality at competitive prices. We offer customers, employees and suppliers a reliable partnership and a complete in-house production cycle.

Our process ranges from tooling, stamping, coining, wire rolling, cleaning and finish treatments to quality control, packaging and shipping services.

Discover our process

Our Vision

We work hard to create a company where quality goes hand in hand with the attention to the needs of the national and international market: both on the technical side and on the human and environmental side.

Our main goals:

  • Supply the customers with excellent products and services.
  • Support them and listen to their needs, developing a cooperative relationship.
  • Work within a quality-oriented system, through cutting-edge technologies.
  • Establish long lasting partnerships with suppliers.
  • Safeguard and protect internal and external environment for a sustainable development of the business activity.

Policy for Quality and Environment


In April 2021 Growermetal achieved quality management system certification according to the EN 9100:2018 standard for the Aerospace industry.

Open certificate EN 9100:2018

Growermetal’s Quality Management System is certified according to the standard IATF 16949 edition 2016 for the automotive industry.

Open certificate IATF 16949

In April 2011 Growermetal achieved the renewed Certification in conformity with the new UNI EN ISO 9001, 2008 Edition.

Open certificate ISO 9001

Growermetal has been certified UNI EN ISO 14001 for the environmental management system since 2006.

Open certificate ISO 14001

Growermetal has achieved the ISO 45001 international standard for Occupational Health and Safety.

Open certificate ISO 45001

Growermetal has achieved the ISO 50001 international standard for the Energy management system.

Open certificate ISO 50001

The Growermetal's Mechanical Zinc Plating Plant has been certified in the year 2009 by MacDermid® and has been included among the main homologated platers for the Zinklad 250M. surface Treatment.

Open certificate Zinklad

The Growermetal's Zinc Flake Plating Plant has been certified in the year 2016 by Dörken MKS-Systeme GmbH & Co. KG as the homologated plater for the use of MKS® products.

Open certificate Dörken


Declaration of Conformity with reference to Directive 2011/65/EU (RoHS) which imposes restrictions on the use of certain hazardous substances in electrical and electronic equipment.

Download declaration RoHS

Declaration of Conformity with reference to Regulation 1907/2006/EC on the Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH).

Download declaration REACH

Declaration of Conformity with reference to Directive 2000/53/EC (ELV) on the recovery of end-of-life vehicles and their components.

Download declaration ELV

Declaration of Conformity with reference to Conflict Minerals legislation - Regulation to combat the import of certain minerals (3TG) from conflict or high risk areas.

Download declaration Conflict Minerals


Our team is at your service to find the best solution for every request.

Contact us

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Discover the open positions in our company. Be part of the Growermetal team.

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