Genstar Capital sold MW Industries, Inc. to affiliates of equity firm American Securities LLC in partnership with MW Industries management. Terms of the deal were not disclosed.

Rosemont, IL-based MW Industries manufactures precision springs and specialty fasteners.

Since being acquired by Genstar in 2011, MW Industries has acquired 12 spring, stamping and fastener manufacturing companies across the U.S. to broaden its product offerings in higher growth markets, including aerospace, consumer products and medical sectors. Companies include Tri-Star Industries, USA Fastener Group, Hi-Performance Fastening Systems, and Futuristics Components.

“MWI has grown both our existing brands and newly-acquired brands through providing custom-engineered solutions to solve customer problems,” stated MW Industries CEO John Bagnuolo.

“Our strong technical expertise, combined with best-in-class service, speed to market and the broadest market basket of products and services in the industry, is valued by customers in a broad range of end markets. We look forward to leveraging American Securities’ significant experience in the industrial sector to help us continue to deliver industry-leading results.”

Founded as a tool and die company, MWI serves more than 45,000 customers in more than 35 countries. Its more than 100,000 products are sold through a combination of direct sales, catalogs, and distributors to original equipment manufacturers and aftermarket customers in aerospace, medical, electronics, energy, agriculture, construction, and other sectors. Web: mw-ind.com

New York City-based American Securities was formed in 1995 and currently owns 22 companies, including American Axle and Manufacturing, school bus manufacturer Blue Bird, and high-performance adhesives maker Royal Adhesives and Sealants. Web: american-securities.com