When it comes to the assembly of aircraft and various aerospace structures, the importance of using high-performance fasteners cannot be overstated. Unlike more general-purpose hardware that is suitable for the assembly of basic machinery and devices, aerospace fasteners are specialized components that are engineered to ensure their performance and reliability under the extreme demands of aerospace environments and operations. In this blog, we will provide an overview of popular aerospace fastener categories and the general qualities that set such hardware apart, helping you have the knowledge you need to make informed purchasing decisions.
When searching for aerospace fasteners, one will find that there are a wide variety of options, each having a distinct design and role in creating or securing joints. Below, we have offered a brief introduction to the most widely-used types.
Aircraft Bolts: Perhaps one of the most common fastening components used in the aerospace industry, bolts are designed to establish a strong and durable connection between two or more parts with the help of nuts and washers. Generally, aircraft bolts are constructed from materials that are lightweight yet durable, as well as those that are resistant to corrosion or extreme temperatures.
Aircraft Rivets: Another popular hardware part type, rivets are used to create permanent joints for assemblies that are difficult or unfeasible to weld. For example, the fuselage will make use of many rivets as wing structures and other parts are secured, providing a reliable, long-term solution.
HI-LOK Pins: HI-LOK pins are high-strength aircraft fasteners that are well regarded for their precise fit and reliable locking capabilities when installed. Featuring a threaded pin and collar that breaks off when optimal torque levels are achieved, a HI-LOK pin will ensure that structural assemblies remain secure, even under intense pressure.
Adhesive Fasteners: In addition to traditional mechanical fasteners like bolts and rivets, adhesive options are also used in select aerospace applications. These components involve bonding materials together in an assembly using high-performance adhesives, which can reduce the weight of the overall assembly. Adhesive fasteners are commonly used for wire management and joining sheet metals, where organization and a reliable hold are needed, but loads are very low.
What sets aerospace fasteners apart from typical options used in other industries are the stringent characteristics they must meet to function effectively in harsh aerospace environments. Here are some of the key attributes that many aerospace fasteners will share:
High Strength: One of the most critical requirements for aircraft fasteners is that they must be extremely strong to handle the high-stress environments in which aircraft operate, so they are typically manufactured from materials like titanium and steel that provide ample durability.
Lightweight: Another key element of aerospace fasteners is their lightweight nature. While being robust enough to reliably support structures, such hardware will leverage materials and designs that provide a high strength-to-weight ratio.
Thermal Resistance: With temperature variations being common during flight operations, aerospace fasteners will make use of materials that offer ample thermal resistance. This is especially important for engine assemblies, braking systems, and external surfaces, all of which are subject to temperature extremes.
Corrosion Resistance: Corrosion is a significant issue for aircraft and aerospace equipment alike, as it can cause a rapid decline of structural integrity. As a result, aerospace fasteners are regularly treated with protective coatings made from resistant materials like stainless steel or aluminum.
When shopping for aerospace fasteners, one will often come across various options that meet industry standards established for the means of adhering to specific requirements for quality, fabrication, and more. Two of the most common specifications that aerospace fasteners are designed to meet include military standards (MS) and National Aerospace Standards (NAS).
Military Standards (MS): These military-oriented fasteners are subject to rigorous requirements established by the US Department of Defense, ensuring that they can withstand harsh environmental conditions, provide a simplistic means of supply with common functionality, and more.
National Aerospace Standards (NAS): National Aerospace Standards are a set of technical specifications for parts and assemblies used in the aerospace industry, established by various AIA member company committees. Fasteners that meet NAS standards are designed to deliver precision, high strength, and reliable performance.
If you are currently in search of a dependable source for aerospace fasteners and other various items of need, look to Automatic Aerospace and our wide range of offerings. Owned and operated by ASAP Semiconductor, we provide fulfillment solutions with uncompromising quality and dedication to timely service. With online quote request forms and team members being available around the clock to provide consultation, we can help you secure competitive procurement options on countless items we feature to meet all your project needs with ease. We even offer solutions for unlisted items, as well as regularly expedite shipping for those with AOG requirements, so never hesitate to call or email to learn all that we can do for you!
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