What is cotter pin?

A cotter pin, also known as a split pin, is a fastener that is commonly used to secure two or more components together. It is typically made of metal and has a semi-circular shape with two tines that can be bent apart to securely hold the components in place.

Cotter pins are often used in machinery, automotive, and construction applications to prevent nuts and bolts from coming loose. They can also be used to secure hitch pins, clevis pins, and other types of fasteners.

Cotter pins come in various sizes and materials, such as steel, stainless steel, and brass. They are easy to install and remove, making them a versatile and reliable fastening solution for a wide range of applications.