Safety Measures For Bolted Connections On Aircraft

Known as the rice of industry, screws are small but important. Especially in the aircraft rocket this high-tech content of objects, and bolts absolutely cannot be ignored, once loose, the consequences are unimaginable! So how do prevent the loosening of bolts?

As a professional fastener manufacturer, Xinchi Fastener Company, based on years of experience in the fastener industry, is pleased to introduce to you how to prevent the loosening of aviation bolts.

Aircraft bolt connection generally has anti-loose measures, such as fuse, cotter pin, safety piece, safety screw, etc. The smaller bracket nuts are self-locking through oval holes, which are oval holes when not installed. There are also some nuts that are clamped through a slot at the end of the nut.

Wire

This method uses a thin wire to hold two or more fasteners together. When a component has a tendency to loosen, it will be restrained by the wire and stop loosening.

Materials: low carbon steel, stainless steel, and brass, generally used is low carbon steel wire. Materials: low carbon steel, stainless steel, and brass, generally used is low carbon steel wire. When the wire is used to prevent loose, single or double-strand insurance can be used. In general, it is most widely used in the form of double twisted braids, as shown in the figure below.

The single-strand wire is usually used for small groups of closely spaced screws or very inaccessible places, as shown in the figure.

In general, if threaded fasteners are clustered together, it is preferable to insure them in series rather than separately. The number of components of series insurance should depend on the specific occasion.

Cotter pin

A Cotter pin is a kind of metal hardware, common name spring pin. It is used to prevent the loosening of threaded connections. After tightening the nut, insert the cotter pin into the nut slot and the hole at the tail of the bolt, and pull the tail of the cotter pin apart to prevent the relative rotation of the nut and bolt.

The installation form of the cotter pin is as follows:

Safety sheet

Safety screw

In addition, thread self-locking is one of the most common anti-loosening measures. The self-locking of thread is usually realized by a special thread type. The pitch (tooth pitch) of the self-locking thread is small. Self-locking performance generally depends on the nut. Unless screw damage is particularly serious, in general, some small faults, such as self-locking force is too small, can be solved by replacing the nut.

Xinchi Fastener Company is a trustworthy fastener company, especially in furniture nuts. And we are the designated fastener supplier to“STAPLE”. As a trusted fastener supplier,  Xinchi Fastener Company can offer a wide range of high-quality fasteners, including tee 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.