Recognized Leader in Aerospace Engineered Solutions

TriMas Aerospace is composed of Allfast Fastening Systems®, Monogram Aerospace Fasteners®, Mac Fasteners™, TFI Aerospace, Martinic Engineering™, RSA Engineered Products and Weldmac Manufacturing Company. Together, these businesses design and manufacture precision engineered components to serve the aerospace markets worldwide. Our businesses pride themselves on working closely with our customers to select the right product for each unique application.

As a group, TriMas Aerospace is committed to the development of next-generation engineering solutions to address complex aerospace applications and solve assembly challenges by reducing cycle time through facilitating robotic assembly techniques. Our innovation teams are made up of engineering experts from our business units who add value by working directly with our customers to address assembly and process challenges to increase productivity, quality, speed, and efficiency while reducing overall installed cost.

Our Businesses

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.

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.


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.

TFI is a leader in aerospace standard fasteners, commercial and aerospace T-bolts and self-locking nuts. We support the critical applications direct to OEMs, Tier 1s, and distribution.

Martinic Engineering is a leading manufacturer of highly-engineered complex parts, serving some of the most demanding applications in the market. Our dedicated and experienced team utilizes state-of-the-art machinery to provide a high level of operational precision during the machining and assembly processes.

RSA Engineered Products is a leading designer and manufacturer of aircraft ducting, high temperature seal connectors, flexible joints, ozone converters and complex assemblies for commercial and defense applications.

Weldmac Manufacturing Company logo

Weldmac is an industry leading manufacturer of highly engineered metal formed components and complex assemblies in the aerospace, defense and power generation markets.