Welcome to MacLean-Fogg Component Solutions - Mundelein

MacLean-Fogg began in 1925 with one product, the No. 1 Railroad Locknut. The long, rich tradition of fasteners at MacLean-Fogg is centered at our Mundelein, IL facility. Here we manufacture over 1,000,000,000 internally threaded fasteners per year for Automotive, Heavy Duty and other Industrial Markets.  We are ISO 9001:2015, IATF 16949:2016 and ISO14001:2015 Certified.

Please click around to learn more about us and our products.  Of course, please feel free to contact us to discuss how one of our internally threaded fastener products could be a component solution for you.

You can download our Divisional Information Sheet by clicking here.

For information on the thread types, sizes, materials, and processes used to manufacture our fasteners, please review our Fastener Manufacturing Reference Guide.  This document will give you an overview of the fasteners we make across several of our facilities.