The traditions of Bumax go back as far as the middle of the 17th century when a forge was established in Åshammar, Sweden and a foundry in Svartå.

Åshammar Bolt Factory was founded in 1899, and in 1926 was one of the very first companies in the world to produce austenitic stainless steel fasteners. Gradually the company changed it’s products and became a true expert in developing and manufacturing cold headed stainless steel fasteners. Today we make fasteners from a wide range of stainless
steel materials and our products are used around the world in the most demanding applications.

In 1997, the Bumax brand was registered. The name carries the tradition, the history and the knowledge of generations of engineers and bolt makers in Ashammar and is known as the strongest stainless steel bolt in the world.


1660Åshammar Forging & Nail founded
1899Name changed to Åshammar Bolt Factory
1916The first cold forming machine installed
1926Production of stainless steel fasteners begins
1947Åshammar Bolt factory incorporated into the Bulten group
1982Hasselfors Stainless merged with Bult Stainless, Åshammar
1997The Bumax brand registered
2000Bulten Stainless incorporated into the Bufab grou