How do cotter pins function in securing aircraft hardware?

Cotter pins play a crucial role in securing aircraft hardware by locking into place through a bent end. When a cotter pin is inserted through a hole in a fastener, such as a bolt or a nut, its ends are typically bent over to create a secure lock. This bent configuration prevents the pin from being pulled out, thereby ensuring that the fastener remains tightly secured and cannot loosen due to vibrations or movement during operation. This locking mechanism is especially important in aviation, where safety and reliability are paramount.

The function of cotter pins as locking devices is fundamental across various applications, not just in aviation but in many mechanical assemblies where securing fasteners is essential. Their design allows for easy installation and removal, providing both security and convenience.

While creating a friction fit, tightening around fasteners, or acting as a spacer may describe other mechanical components or fasteners, they do not accurately capture the specific locking mechanism that cotter pins utilize. Understanding the unique role of cotter pins in assembly can help reinforce their importance in ensuring the integrity and safety of aircraft hardware.