Clevis Fasteners and Their Uses: A Comprehensive Guide

Introduction

When it comes to fasteners, screws and bolts are the first things that come to mind. However, the world of fasteners goes beyond these common options. Clevis fasteners, for instance, offer unique advantages for securing loads to machinery, trailers, pickup trucks, and more. In this comprehensive guide, we will explore the uses, types, and components of clevis fasteners, providing you with valuable insights to make informed decisions.

What is a Clevis Fastener?

A clevis fastener is a U-shaped or hook-shaped device with two holes that hold a pin in place. These holes are located in the open section of the clevis, each on a respective prong, allowing for the usage of a pin. The three main pieces of a clevis fastener are the clevis, clevis pin, and tang. Some clevis fasteners may also include a split pin for additional security.

Common Uses of Clevis Fasteners

Clevis fasteners are widely used in various machines and applications, including automobiles, aircraft, boats, and construction equipment. Their versatility and reliability make them ideal for securing loads in different environments.

The Components of a Clevis Fastener

Let’s take a closer look at the various components found in a clevis fastener:

Clevis Pin:

This part holds the tang firmly in place, ensuring a secure attachment to the clevis.

Clevis Hanger:

The hanger consists of both a U-shaped and a V-shaped clevis. The V-shaped clevis has a hole in the flattened area at the base, allowing for the use of a pin or bolt. Clevis hangers are often used for vertical pipe adjustments and pipe attachments.

Clevis Hook:

This hook does not have a snap lock but features a clevis and pin or bolt at the base. It is used to fasten to a bracket or chain.

Clevis Hitch:

A clevis hitch is specifically designed for towing purposes, such as trailers. It is often combined with lunette rings and can be compatible with tow balls.

Clevis Shackle:

A clevis shackle is a U-shaped piece of metal fastened with a clevis pin or bolt across the opening. It can also be secured with a hinged metal loop connected with a locking pin mechanism for quick-release capabilities.

Clevis Rod Ends:

Clevis rod ends are machined or folded pieces molded into a clevis shape. They have a hole at the base for attaching a rod, which is typically threaded for additional security.

Clevis Bolt:

Clevis bolts are designed for shearing stress but are not used in tension. They have slotted brazier-type heads.

Clevis Bracket:

Clevis brackets are solid metal pieces with flat rectangular bases. They have holes for bolts and machine screws and two rounded wings parallel to each other, forming a clevis. Clevis brackets are commonly used in automobiles and airplanes for mounting rods to flat surfaces.

Threaded vs. Unthreaded Clevis Pins

Clevis fasteners can be secured using either threaded or unthreaded clevis pins. Unthreaded pins have a rounded head on one end and a cross-hole on the other. They slide into place instead of screwing into the clevis. Threaded pins, on the other hand, have threading or partial threading on one end and a formed head on the other. They provide better stability and security compared to unthreaded pins.

Types of Clevis Fasteners

The most commonly used type of clevis fastener is the shackle, which consists of a clevis, tang, and clevis pin. This is often referred to as a “standard clevis.” Another popular type is the bracket, which has a rectangular-shaped hook with holes for screws, bolts, and other fasteners. There are also specialty clevis fastener options, such as clevis hangers and clevis rod ends, each offering unique advantages for specific applications.

Frequently Asked Questions About Clevis Fasteners

Here are some answers to common questions about clevis fasteners:

What is the purpose of a clevis?

Clevises are used to connect and secure loads to machinery, pickup trucks, trailers, and even aircraft.

Is a clevis pin stronger than a bolt?

Yes, a clevis pin is generally stronger than a bolt. The size and design of a clevis pin provide better strength compared to a bolt of the same diameter.

How strong is a clevis pin?

Clevis pins are exceptionally strong and can be manufactured in different grades of steel to meet specific requirements.

What is a clevis end?

A clevis end is used to attach or disconnect levers, chains, hooks, and ropes to a mounting point. It allows for seamless connection and disconnection.

Is there a difference between a shackle and a clevis?

While shackles and clevises may have similar designs and appearances, their purposes tend to differ. Shackles are commonly used in rigging, lifting, and construction, while clevises are primarily used in farming, towing, and other less demanding applications.

Are clevis pins hardened?

Yes, clevis pins are typically hardened to enhance their strength and durability.

What is a Clevis Hook?

A clevis hook is a hook-shaped fastening device with a clevis and pin or bolt at the base. It is used to fasten to a chain or bracket securely.

Conclusion

Clevis fasteners offer versatile and reliable solutions for securing loads in various applications. Understanding their components, types, and uses is crucial for making informed decisions. Whether you need to connect loads to machinery, trailers, or other equipment, clevis fasteners can provide the strength and security required. If you are interested in custom clevis fabrication services, The Federal Group USA can provide high-quality solutions tailored to your specific needs. Contact our experienced customer sales engineers to learn more about our capabilities and services.