Monogram Aerospace Fasteners® Product Range

Monogram Aerospace Fasteners® is part of Trimas Aerospace™ which serves the world’s markets with industry leading products including specialty fasteners, temporary fasteners for fixturing and alignment, fastener installation tools, finishing and removal tools and the design of innovative fastening solutions for the aerospace industry. The blind rivet portfolio of Monogram Aerospace Fasteners® includes:

Visu-Lok® Fasteners

The Visu-Lok® family of fasteners, designed for use in metal structures addressing the need for cost-effective one-sided fastener installation for decades. The basic design of the Visu-Lok® is based on the nut and bolt principles. However, the Visu-Lok®, unlike conventional nut and bolt pairings, is fully installed and verified from one side of the structure. Key Features: 
High strength fastening system available to 112 KSI shear 
Ease of installation further simplified by the drive nut concept 
Simple wrenching motion installation provides superior limited-access capability 
Self-locking device resists loosening in severe vibration environments 
Self-inspecting – installations are fully verified from one side of the structure 
Available in a wide range of materials, sizes, and head styles, including oversize and close tolerance interference fit configurations to suit most applications 
Visu-Lok® is covered by NAS standards and available in either unified or metric sizes 
Easily adapted to robotic or automated installation.

Composi-Lok® Fasteners

Composi-Lok® fasteners are industry standard for blind fastening of composite joints. 

Designed for use in composite laminates but equally well-suited to metal structures, the Composi-Lok® family of fasteners provides superior joint integrity and approved on virtually all composite airframe programs throughout the world. 
Composi-Lok II fasteners incorporate Monogram’s drive nut concept, further simplifying the installation process by incorporating a disposable hex drive nut. The hex drive nut provides a positive fastener-to-tool engagement and eliminates the tendency for flush-style fastener recesses to “cam out” during installation. Since the drive nut is common to a variety of diameters and all head styles, only three nose pieces are required to install the entire Composi-Lok® line. Nose pieces never wear out, and the disposable magnetic drive nut stays on the discarded pintail after installation, permitting easier retrieval and minimizing the chances of small pintails finding their way into F.O.D. critical areas. Composi-Lok IIa and Composi-Lok3 variations also incorporate the drive nut feature. 
Composi-Loks® can also be supplied with Monogram’s Double Cylindrical Drive (DCD) system for automated or robotic assemblies. The DCD system provides a common tool cylindrical interface regardless of head style, fastener grip, or diameter, matching that of the drive mechanism, thus eliminating orientation problems. 
Composi-Lok IIa fasteners, with their unique design characteristics, address the inherent thickness variations of composite material stack-ups. These common variations make proper grip measurement practices imperative to assure fastener performance and joint integrity. Compared to the Composi-Lok II, the Composi-Lok IIa fasteners offer a wider, more tolerant grip range, accommodating a total of 0.100" of variation (0.025" over and under the standard range). This extended grip capacity enables them to function properly even when installed .050″ beyond their prescribed grip accommodation with added assurance of joint integrity in limited out-of-grip conditions for composite structures with inherent material thickness variations or damage of the composite material. 
The more recent Composi-Lok3 is the newest cost-saving design in the Composi-Lok series. It is shave-free, providing the performance and reliability of Composi-Lok® with the added benefits of a flush break to deliver lower installed costs and increased productivity. Designed to afford a flush to below-flush break-off, the Composi-Lok3 requires no secondary shaving, milling, or grinding operations to meet aerodynamic flushness requirements. All the performance and reliability of our Composi-Lok is available with a flush break-off. Without compromise on mechanical properties, high preloads, or large blind side head formation, there are savings on tooling expense as well as the time and cost of shaving while productivity is increased with labor dedicated to other tasks. 
Key Features: 
Large blind upset eliminates composite damage 
Easy, labor-saving one-sided installation further simplified by the drive nut concept 
Controlled clamp-up – no gaps and tighter assemblies 
Completely compatible with graphite – available in titanium or CRES materials to resist galvanic corrosion 
Visual locking feature resists loosening due to vibration 
Fuel-tight sealing capability

Radial-Lok® Fasteners

Radial-Lok® unique hole-filling, high strength blind fasteners. With their uniform radial expansion throughout the entire fastener grip, Radial-Lok® fasteners are uniquely suited to offer both enhanced fatigue strength and lightning strike damage protection. 
Uniform radial expansion throughout the entire length of the clearance fit hole. Key Features: 
Interference fits to .006″ 
Enhanced fatigue life 
Better lightning strike protection 
Eliminates costly hole preparation 
Clearance fit before installation 
Easy one-sided installation 
High clamp-up 
Large blind-side upset 
Tighter joints 
Ideal for aluminum and composite applications 
Available in 3/16″ through 3/4″ diameters, including oversizes 
.100″ grip accommodation 
7-degree blind slope capability

OSI-Bolt® Fasteners

OSI-Bolt® are the only blind bolts capable of equivalent usage with solid shank bolts offering a full 1.5D bearing area. The revolutionary OSI-Bolt® fasteners are a direct replacement for solid shank pin-and-collar systems. The innovative design of these high strength fasteners for primary structures deliver strength with the added advantages of simple one-sided installation and a flush break-off for installed cost savings in both metal and composite structure. The updated titanium Ti-OSI® combines all these advantages in a weight-saving configuration. Key Features: 
Physical strength comparable to shear-type pin-and-collar systems 
95 KSI shear and 112 KSI shear availability 
Available in a variety of hex, tension, shear, and protruding head styles 
Diameters from 5/32″ to 1/2” 
1/64” and 1/32” oversize availability 
1/16” grip with +/- .015” capability 
“Vise-like” sheet take-up consistently provides the highest preload in the industry 
Flat, uniform blind-side footprint is the largest in the industry 
Blind-side formation is away from the edge of the exit hole 
Seven degree blind slope capability 
Interference fit to .003” in steel 
Resistant to vibration 
Ideally suited to composite or metallic applications 
Lightweight titanium version available 
Internally self-sealing to 100 PSI air 
Easily adaptable to Monogram’s robotic Double Cylindrical Drive (DCD) system

For additional information please refer to the respective product presentations at our Web Platform for Supplies (shop.aviationeu.supplies).