CITT Trattamenti termici Srl is an Italian company that started out as a manufacturer of heat treatment equipment and later in the early 1990s decided to focus on metal heat treatment services for third parties. Experience as a manufacturer allows CITT to be a highly technical and qualified supplier and partner, as demonstrated by the certifications received from major players in the bolting and fastener industry. Since 2019, it has been acquired by Colombo Special Fasteners Srl, a company specialising in the manufacture of special customised parts (screws, fasteners, special nuts, bushings, etc.), one of Europe's leading cold forming companies. CITT is currently located in Usmate Velate in a new 4.0 plant, with completely renovated facilities. Hardening, tempering, annealing, normalising, atmospheric carburising and carbonitriding: a wide range of heat treatments that, together with 30 years of experience, allows it to offer performances always in line with the increasingly demanding market requirements.