1946	"Gamma Officine Meccaniche S.n.c." is established in Lissone to produce metallic small parts.
1951	Gamma starts the production of cold formed wing nuts.
1960	"Gamma S.a.s. di Gino Manstretta" moves to the new factory in Lissone where, in addition to wing nuts and screws, it produces pipe plugs as well as items for the car industry.
1966	Gamma expands its selling network to West European and North American markets.
1973	Gamma starts production of thumb screws, mainly for the American and English markets.
1981	By this time Gamma is specialized in items for manual use and completes the technology for the production of cold formed eyebold and hooks.
1988	Gamma moves to the new headquarters in Muggiò in order to better satisfy the demand of its customers and following yearsit's more and more present in all western areas and reaches an export share of 80%.
1994	Gamma is certified as per ISO 9002.
2000	Further restructuring of its offices and expansion of the production plant took place at the end of the 1990s, underlining Gamma's readiness to rise to the technological challenges of the new millennium with intelligence, devotion and creativity.
2003	Gamma is certified as per ISO 9001:2000
2006	60th Gamma's anniversary