Rivet

A rivet is a small metal pin.

It stays in place forever. It holds metal parts together.

To use one, a person puts it in a hole. Then they hit the end with a hammer.

This makes the end change shape. Now the pin has a head on both sides.

This makes the joint very strong. It can hold big bridges.

It can also hold fast planes.

Long ago, people used them for swords. They even used them on spears.

Today, we use them to build many things.

A rivet is a permanent metal fastener. It is used to hold parts together.

A solid rivet looks like a smooth rod. It has a head on one end. The other end is called the tail.

To install a rivet, you put it in a hole. Then, you hit the tail to change its shape. This new shape is called a shop head.

Now the rivet has a head on both ends. This helps it stay very strong.

Long ago, people used rivets for tools. They found them on old Egyptian spearheads. They also found them on Bronze Age swords.

Some rivets are special. Blind rivets, or "pop" rivets, are different. You only need to reach one side of the metal to use them.

A tool pulls a thin nail through the rivet. This makes the rivet expand. It locks the parts in place. Modern planes use hundreds of thousands of solid rivets to stay safe in the sky.

A rivet is a permanent metal fastener used to join parts together.

Before it is installed, a solid rivet looks like a smooth metal cylinder. It has a head on one end and a tail on the other. Once the rivet is installed, the tail is smashed into a new shape. This new shape is called a shop head or a buck-tail. Because the rivet now has a head on both ends, it can support tension loads. It is even better at supporting shear loads, which are forces pushing sideways against the shaft.

There are many ways to install these fasteners. One way is by hand using a hammer and a bucking bar. The bucking bar is a heavy, specially shaped block of metal. An installer holds the bar against the tail while a rivet gun hits the factory head. The gun sends quick, strong forces that squash the tail against the bar.

For very large or hard rivets, workers might use a squeezing tool instead. This tool clinches both ends to change the rivet's shape. Some people even use a ball-peen hammer and a special hole called a rivet-set. This rolls the edge of the metal so it sits flat against the material.

Rivets are among the oldest tools humans have used. Archaeologists have found rivet holes in Egyptian spearheads from between 4400 and 3000 B.C. They have also found them on Bronze Age swords and daggers. Back then, metalworkers used short metal rods. They would hammer them into a hole and squash the other end to hold it. In the past, installing rivets was a big team job. It often took four skilled workers to do it right. They included a warmer, a catcher, a holder, and a basher.

Today, different types of rivets serve different jobs.

Solid rivets are used where safety is very important, like in the frames of modern aircraft. Planes can use hundreds of thousands of them. These rivets are often made of aluminum alloys or titanium. There are also semi-tubular rivets, which have a small hole at the tip. This hole makes them easier to install because they need less force. Blind rivets, often called "pop" rivets, are quite different.

They allow a worker to fasten parts even if they can only reach one side. This was a big improvement over older methods.

Many things in our world rely on these small metal pieces. You can see them on huge structures like the Golden Gate Bridge.

They are also used in everyday items like ladders, brakes, and electronics. While high-strength bolts have replaced many steel rivets in big buildings, rivets are still vital. They are used by artists to make modern jewelry and metal clothing. From ancient spears to modern airplanes, the rivet has helped humans build things that last. It is a simple idea that makes very strong connections.

A rivet is a permanent mechanical fastener used to join pieces of material together.

Before installation, a solid rivet is a smooth cylindrical shaft with a head on one end. The end opposite the head is called the tail. Once installed, the deformed tail becomes a second head known as a shop head or buck-tail. Because the finished rivet has a head on both ends, it can support tension loads. However, rivets are even more capable of supporting shear loads. These are forces that act perpendicular to the axis of the rivet shaft.

Installing solid rivets involves several different mechanical processes. One common method uses a pneumatic hammer and a bucking bar. The installer places a rivet gun against the factory head. They hold a bucking bar, which is a specially shaped solid metal block, against the tail. The rivet gun delivers high-impulse forces that upset the tail against the inertia of the bar. For larger or harder rivets, workers might use a squeezing tool. This tool clinches both ends of the rivet to deform it. Another manual method uses a ball-peen hammer and a rivet-set. The rivet head sits in a special hole called a rivet-set while the hammer rolls the buck-tail flush against the material.

Historically, riveting was a highly coordinated team effort. In large projects, a furnace heated rivets until they were "cherry red." A rivet warmer used tongs to throw the hot rivets to a catcher. The catcher used a leather or wooden bucket to receive them. This catcher then inserted the rivet into the hole. A holder would then press a heavy bucking bar against the factory head. Finally, a riveter, sometimes called a "basher," used a hammer to mushroom the tail into a shop head. This process was vital for massive structures like the RMS Titanic.

There are three main categories of rivets used in engineering.

Solid rivets consist of a simple shaft and head. These are used in high-safety applications like aircraft frames. Modern planes may use hundreds of thousands of solid rivets made from aluminum alloys or titanium. Semi-tubular rivets are similar but have a partial hole at the tip. This hole reduces the force needed for installation by about one-fourth. Finally, blind rivets, or "pop" rivets, are designed for one-sided access.

They use a nail-like mandrel that is pulled through the rivet to expand it.

Blind rivets represented a major technological leap in fastening.

Before this invention, workers needed access to both sides of a joint. In 1916, engineer Hamilton Neil Wylie patented an improved way to close tubular rivets. He later developed a pull-through mandrel design in 1927. This allowed the rivet to be used "blind," meaning it could be installed from one side only. By 1928, companies were producing one-piece units that included the mandrel. This innovation made it much easier to assemble complex parts where the back side is unreachable.

Rivets have been used by humans since the Bronze Age.

Archaeologists have found rivet holes in Egyptian spearheads dating between 4400 and 3000 B.C. Bronze Age swords and daggers also show evidence of rivet use for handles. In modern construction, rivets played a massive role in landmark projects.

For example, the Golden Gate Bridge used original structural steel rivets in its 1937 construction. While high-strength bolts have largely replaced steel rivets in modern building codes, rivets remain essential in other fields.

Today, the application of rivets spans from heavy industry to fine art. They are vital in the structural parts of aircraft, where reliability is critical. Aluminum rivets for planes sometimes require "solution treating" to soften them for installation. They may even be kept in an "ice box" to slow age-hardening. In other areas, semi-tubular rivets are used in lighting, brakes, and electronics. Even artisans use rivets to create modern jewelry and metal couture. From ancient weaponry to the wings of a jet, the rivet remains a fundamental tool of construction.