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A Guide to Aerospace Fasteners

by Steven Brown
Aerospace Fasteners

There are over 1 million aircraft fasteners on an airplane, yet they are some of the most underrated parts of the aerospace hardware industry.  Although they may not get much attention, they are necessary in order to keep an airplane in the air. 

While they may not be as intriguing as a couple of twin jet engines, the appropriate selection and application of aerospace fasteners are crucial to the protection of countless individuals every day. As a result, the aerospace hardware industry has managed to keep up with technological advancement, resulting in manufacturing modern and extremely sturdy aerospace fasteners.

This article discusses everything needed to get an understanding of Aerospace fasteners, including what they’re made of, their importance, and what goes into making them. 

What are Aerospace Fasteners? 

One form of CNC-machined aerospace item, known as aerospace or aviation fasteners, is used primarily in creating aerostructures. Instead of being made in a single factory, the aircraft-specific components are assembled at several manufacturing facilities. In the final aircraft assembly, these fasteners must connect the components to a whole airplane.

In terms of weight and safety, the aerospace sector is rigorous, and why shouldn’t it be? The lives of the passengers depend on it!  Consequently, aircraft fastener suppliers must offer fasteners of the highest calibre and most robust. Let’s understand what materials the aerospace hardware industry uses that make Aerospace fasteners durable.

Materials That Make Aerospace Fasteners Durable

Different kinds of fasteners are used in the aviation industry, and not all materials are suitable for their manufacture. The reason is that these aerospace hardware’s properties are determined by the materials used to manufacture them. The following materials are used to make various kinds of airplane fasteners:

Steel – Steel provides immense durability but also contributes significant weight. The steel bulk is a barrier since aircraft fasteners must be as light as possible.

Aluminum – Due to its accessibility and low cost, this metal is light and used to produce various aerospace hardware. Despite being utilized to make plane pieces, this material has significant drawbacks that need further surface treatment to improve its qualities.

Titanium – Titanium is lighter when compared to steel and stronger than aluminum. 

Super Alloys – These alloys are ideal for usage in aerospace hardware since they can endure high pressure and temperature levels. They are also known as high-performance alloys because they retain their structural and surface integrity despite harsh environments.

Properties of Fasteners to Seek From Aircraft Hardware Suppliers

Fasteners must be very durable to withstand intense gravitational pressure. They are important equipment that affects the overall effectiveness and reliability of the aircraft. Additionally, these fasteners must successfully pass strict standard certification to effectively control production and usage.

Any piece of machinery that requires a precise and elevated-quality attachment may get these fasteners from aircraft hardware suppliers. Some of these fasteners’ most typical characteristics are listed below:


Resistant to oxidation and corrosion

Self-sealing and locking 

High strength under tension, stress, and shearing

Types of Fasteners Available Through Aerospace Hardware Distributors

Some aircraft fasteners are widely used in conventional aviation and are conveniently accessible from aerospace hardware distributors. A few of them are discussed below to better the reader’s understanding: 

Aerospace Screws – Such fasteners are the most popular external thread, or helical ridge, thread fastening technique. They are often installed with a free thread and made of weaker metals than bolts.

Aerospace Rivets – Rivets are utilized to link several metal plates, sheets, or sections of metal and feature a polished cylindrical shaft with a crown on one end. The end of the rivet is disturbed to create a second head that tightly binds the two pieces together when the shank is inserted into matching apertures in two material pieces.

Lock Bolt Rivets or Aerospace Collars – These fit with lock bolt rivets perfectly which are available separately at any aircraft hardware supplier. They have suitable metal alloy cores and help secure the rivet to the target.

Aerospace Nuts – These nuts are threaded fasteners composed of 2024T anodized aluminium alloy, stainless steel, or carbon steel with cadmium plating. Additionally, a matching bolt or screw is always utilized with them. Non-locking and self-locking airplane nuts are available.

Aerospace Bolts – Bolts are constructed of anodized aluminium alloys, corrosion-resistant steel without plating, corrosion-resistant steel with zinc plating, or cadmium. Furthermore, MS bolts, NAS internal wrenching, close tolerance bolts, and AN bolts are the kind of bolts most often used for airplanes.

Some Unique Fasteners to Ask Aircraft Fastener Suppliers About

Some unusual fasteners are used in lieu of AN nuts and bolts because of their increased metal durability and low weight. Additionally, most light sport aircraft heavily rely on unique fasteners. Here are a few of the specific fasteners that are most often utilized that one can ask Aircraft Fastener Suppliers about:

1Taper-lok – Taper-Loks are the strongest aircraft fasteners. Their tapering shape presses on the hole walls and fills the holes without deforming shanks, unlike rivets.

Turnlock Fasteners – On an airplane, inspection plates, doors, and other detachable panels may be fastened with turn-lock fasteners. This aircraft gear’s rapid opening, swift action, and strained panel fasteners are also well known.

Hi-Tigue – A beading envelops the base of the Hi-Tigue distinctive fastener’s shank. The bead enhances joint durability by preloading the space it plugs. It rubs against the tunnel sides during installation, causing radial pressure that strengthens the surrounding region. 

Dzus Fasteners – The Dzus turn-lock fastener comprises a stud, a spring, a grommet, and a receptacle, while the grommet is made of aluminium or an alloy. If the typical sources of grommets are unavailable, they may form using 1100 aluminium tubing.


Without aerospace fasteners, an airplane would be made up of unattached components and useless. The fundamentals of fasteners used in airplane building have been well-explained in this article. However, if there are any further questions, please reach out to the experts at Apollo Aerospace Components, one of the leading aircraft fastener suppliers in the country. Apollo Aerospace Components leads the aerospace hardware industry with a full selection of hardware and fasteners for use in all aeronautical and defence applications.

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