Welcome to
TriMas Aerospace

TriMas Aerospace, a division of TriMas Corporation, is a leading designer and manufacturer of aerospace specialty fasteners and precision machined components and is comprised of our three businesses: Monogram Aerospace Fasteners®, Allfast Fastening Systems®, and Mac Fasteners™. TriMas Aerospace provides our customers with industry-leading products and services that reflect the company’s commitment to market leadership, innovation, and operational excellence.

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A Look Inside TriMas Aerospace

Some of the most highly regarded, innovative, awarded, and value-centered names in aerospace fastening and precision machined components have come together, bringing the industry they serve the advantage of more than 230 years of experience. Watch this video to learn more about TriMas Aerospace, which is comprised of Allfast Fastening Systems®, Monogram Aerospace Fasteners®, and Mac Fasteners™.

Our Businesses

Allfast Fastening Systems logo

Allfast Fastening Systems is a leading global manufacturer of solid and blind rivets, blind bolts, temporary fasteners, and installation tools for the aerospace industry with content on substantially all commercial, military, and general aviation platforms in production and in service.

Monogram Aerospace Fasteners logo

Monogram Aerospace Fasteners is a leading designer and manufacturer of permanent threaded blind bolts, collars, and temporary fasteners used in commercial, business, and military aircraft.  Monogram’s trademarked custom engineered fastener solutions like Visu-Lok®, Composi-Lok®, Radial-Lok®, and OSI-Bolt® offer unique solutions for the aerospace industry.


Mac Fasteners is a high-volume producer of standard aerospace screws and bolts including NAS, MS, AN, and AS standards used around the world in support of a variety of commercial and military applications.