A rivet nut
, also known as a threaded insert or a blind rivet nut, is a mechanical fastener that is used to insert a threaded hole into materials that are too thin to be tapped. Rivet nuts are commonly used in the automotive and aerospace industries to attach components to sheet metal and other thin materials. They are installed by inserting them into a pre-drilled hole and then pulling the mandrel, or stem, of the rivet nut to expand the body of the fastener. This causes the material around the rivet nut to be drawn up and into the body of the fastener, creating a secure and permanent connection. Rivet nuts are available in a variety of sizes and materials, including aluminum, steel, and stainless steel.
Rivet nuts are typically made of aluminum or steel and can be inserted into materials such as sheet metal, plastic, or fiberglass. They are installed using a special tool that pulls the mandrel through the material, expanding the back end of the rivet and creating a strong, secure grip. Rivet nuts are commonly used in automotive and aerospace applications, as well as in construction and industrial settings.
Here are the basic steps for using rivet nuts:
Determine the size and thread type of the rivet nut that you will be using. Rivet nuts come in a variety of sizes and thread types, so it's important to make sure that you have the correct one for your application.
Drill a hole in the workpiece where the rivet nut will be installed. The hole size should be slightly larger than the diameter of the rivet nut mandrel (the part of the tool that goes into the hole).
Insert the rivet nut
into the hole, making sure that the flange (the wide part of the nut) is flush with the surface of the workpiece.
Insert the mandrel of the rivet nut tool into the hole and through the center of the rivet nut.
Pull the trigger of the rivet nut tool to expand the rivet nut and secure it in place.
Once the mandrel of the tool is through the rivet nut, the mandrel is pulled back, the mandrel head will pull the mandrel out of the rivet leaving the flange of the rivet nut flush with the surface of the material.
Test the tightness of the rivet nut by screwing in the desired bolt, if required, and ensure the rivet nut is secure and holding the desired load.
Note: Always wear safety goggles and follow the manufacturer's instructions for the specific rivet nut tool you are using.