Cotter Pins

Cotter pins, also known as split pins, are simple fasteners used to secure other fasteners or components.

Their typical characteristics and applications include:

• Design: A cotter pin is a metal fastener with two tines or prongs that are bent during installation. One end is typically wider than the other, resembling a “T” or “hat” shape.
• Securing Bolts and Nuts: They are often used to prevent nuts and bolts from rotating or falling out. The pin is inserted through a hole in a bolt or shaft, and the protruding ends are then bent outward. This creates a lock that prevents axial movement.
• Safety Applications: Due to their secure locking ability, they are commonly used in safety-critical applications such as in automotive brake systems, gear assemblies, and machinery.
• Ease of Use: Cotter pins are relatively easy to install and remove, which makes them useful for applications where frequent disassembly is required.
• Materials: They are typically made from mild steel or stainless steel, although other materials may be used for specific applications, especially where corrosion resistance is important.
• Versatility: Cotter pins are used in a variety of applications, ranging from simple mechanical devices to complex aerospace and automotive systems.

Their simplicity, effectiveness, and low cost make cotter pins a widely used component in many mechanical and engineering contexts.