Popular Pin Types

There are many types of fastener pins. They’re a crucial component that are used in a wide range of applications across various industries. Pins play an important role in joining and securing components together. Each type of pin has unique features that make them suitable for specific applications.

Clevis Pins

These pins are a fastener which consists of a clevis head and shank with a hole at the opposite end. The head provides a stop which prevents the pin from slipping through the hole. The hole allows for a cotter pin or other wire to secure the pin in place. These are frequently used in mechanical applications, suspension systems, and hydraulic cylinders.

Cotter Pins

Cotter pins are used to secure bolts and other fasteners in place such as clevis pins. There are two tines which can be bent to form a “U” shape. Once it has been inserted through the hole, the ends can be twisted together to ensure it’s secured. These pins are typically used in automotive, marine and aviation.

Dowel Pins

Dowel pins are used to join two components together. These fasteners have tight tolerances and are used when precision is important. Most people are familiar with wooden dowels which are used when assembling household furniture. Dowel pins have a similar function but are metal to ensure components are securely fastened. Some pins have a chamfered end to aid with insertion and alignment.

Spring Pins

Spring pins have many names including roll pins or split pins which are used to secure components together. Coiled (or spiral) spring pins have a coiled spring which expands once inserted. Slotted spring pins have a slot down the entire pin to ensure there is constant pressure applied to the sides of the hole once it has been installed. Coiled pins are used when there is no axial load and are good for heavier duty applications with vibration. Slotted pins are typically cheaper and can be used for more basic applications.

Quick Release Pins

Quick release pins are frequently referred to as detent pins, ball pins, lock pins, or ball lock pins. The head type may vary from a ring, t-handle, or knob. These pins enable a quick and secure alignment which can have locking features.  At the bottom of the shaft, there is a spring loaded ball. On locking pins, this ball will not release until the button is pushed on the handle. On nonlocking pins, the ball will retract when the pin is inserted or pulled out. These pins are used in manual assembly of products and fit into machine components.

Taper Pins

Taper pins are used to join two components that require a tight fit. They have a tapered shaft that is wider at one end than the other, allowing them to be driven into a hole with a tight fit. Taper pins are commonly used in mechanical applications, such as joining gears and pulleys.

Understanding the differences between the different types of fastener pins is important for selecting the right one for your application. Each pin has unique features which make them suitable for different projects. By selecting the correct pin, you’re ensuring that your components are securely fastened together. You can see some of the pins we list here. If you need assistance locating a specific type of pin, please reach out to our sales team sales@knappfast.com.