Introduction Of Aviation Fastener Knowledge

The number of fasteners on an aircraft can range from tens of thousands to millions. On the largest aircraft, the number of fasteners is more than four million pieces, the types of fasteners can be thousands of types and specifications may add up to tens of thousands. Some fasteners may need to be composed of five parts. The precision of each of these five parts is very high because they have to fit together. At the end of use, no one should deviate from the value of the theoretical design, otherwise the fastener cannot be used. So it is tough to manufacture aviation fasteners. Because it’s easy to make a good one, it’s tough to make a million good ones in a row, without defects or waste.

When it comes to aerospace fasteners, as the name implies, aerospace fasteners are fasteners used in aerospace equipment, such as satellites, rockets, spacecraft, and aircraft. When a little screw wants to travel in space, how many tests does it have to go through?

Xinchi has more than ten years of experience in the fastener industry. Today we’d like to share the relevant knowledge of aviation fasteners.

How to choose aerospace fasteners?

It is not easy to enter the space for a screw. From the beginning of raw materials, after tempered, according to the highest standard selection, after numerous tests and a variety of tedious processes, a small screw is eligible to get the space pass, into the whole arrow and the whole star assembly link. The materials used to make aircraft must follow the principle of lightweight and high strength. Aluminum alloy is the first choice, followed by other materials.

There are many raw materials commonly used in aerospace fasteners according to different uses, and the most used is iron alloy, that is, various kinds of steel. Of course, what is needed here is a stronger steel, namely ultra-high strength steel. There are special properties of steel, such as stainless steel, and heat-resistant steel. They all have applications, such as aircraft engines, landing gear, fasteners for launch vehicles, and structural parts made of this material. In addition, titanium alloys have applications, but because titanium alloys are more expensive, their application is limited. The rest is aluminum alloy, designed to reduce the weight of the aircraft. Therefore, the metal materials commonly used in aerospace are basically divided into three categories, namely steel, titanium alloy and aluminum alloy.

Characteristics of aviation fasteners:

The thread is MJ thread, UNJ thread, or MR Thread.

Aviation fasteners adopt strength and temperature classification.

Aviation fasteners are of high strength and lightweight. Their strength levels are generally above 900MPA and can reach 1800MPA or higher.

Aviation fasteners have high precision, good anti-loose performance, and high reliability.

Aviation fasteners can adapt to complex and changeable environments.

Aviation fasteners have strict requirements for all materials.

Introduction of aviation fasteners:

There is a wide variety of aerospace fasteners. At present, it is mainly divided into rivets, bolts (screws), nuts, single-side fasteners and other product types. Each category includes a variety of varieties and specifications to meet the needs of installation in different materials and structures. In aerospace fasteners, the most common fastener is high-strength rivets, the use of which can reach hundreds of thousands of pieces.

Then some less common products are different from commercial fasteners, such as “talking bolts”. The bolt has a small light-colored ring on the head, and sensors measuring up to five microns thick are attached to the top of the bolt in an embroidery-like process. Combined with the special measuring instrument, it can accurately measure the preload of smart bolts in real-time in situ, remind the user whether the bolt is installed in place, and improve the measuring accuracy by 10 times. There is also a “stealth bolt”, all products of countersunk head height size is controlled within 0.05 mm, only about half of the hair, which can make the surface of the aircraft after assembling the skin smooth as satin. The high-temperature resistant bolts are processed with refractory alloys including niobium, tungsten, and tantalum, and an anti-oxidation ceramic coating is sintered on the surface of the bolts. Wearing the “ceramic coat”, the bolts can withstand the high temperature of 1800℃.

XINCHI is a trustworthy fastener company, especially in furniture nuts. We have a factory,  founded in 2007. And we are the designated fastener supplier to“STAPLE”. As a trusted fastener supplier,  XINCHI can offer a wide range of high-quality fasteners, including nuts, screws, bolts, rivets, washers, etc. If you want to know more about fasteners or want to wholesale fasteners, please feel free to contact us. And then our experienced and expert service team will reply to you as soon as possible.