Rivet Nuts

What Are Rivet Nuts?

Rivet nuts, often referred to as rivnuts or threaded inserts, are specialized fasteners designed to create strong, load-bearing threads in thin or soft materials like metal, plastic, or composites. These versatile components feature a tubular structure with a flanged head, combining the functionality of a rivet with a reliable internal thread. Unlike traditional nuts and bolts, rivet nuts are particularly useful in thin-walled materials where creating a secure thread would otherwise be challenging. They are widely used in industries such as automotive, construction, and furniture assembly, as well as in DIY projects, offering a practical solution for applications where regular fasteners are less feasible. From small repairs to heavy-duty installations, rivet nuts provide a robust and efficient fastening method.

How Do Rivet Nuts Work?

The functionality of rivet nuts relies on a straightforward yet effective installation process. First, a pre-drilled hole is made in the workpiece, sized to match the rivet nut’s diameter. The rivet nut is then inserted into the hole, and a specialized rivet nut tool is used to compress it. This compression causes the unflanged end of the rivet nut to deform and expand, creating a bulbing effect that grips the back of the material securely. The result is a large surface area that provides strong pull-out resistance, ensuring the rivet nut stays firmly in place. Once installed, the rivet nut’s internal thread remains intact, allowing a screw or bolt to be fastened into it. This process makes rivet nuts an excellent choice for creating vibration-resistant joints in thin materials, such as sheet metal, plastic panels, or composite structures.

What Material Are Rivnuts Made From?

Rivet nuts are available in a variety of materials, each suited to specific application requirements. The most common material is stainless steel, which offers excellent corrosion resistance and durability, making it ideal for environments exposed to moisture, chemicals, or extreme temperatures—such as in marine, automotive, or outdoor construction settings. Another popular option is aluminum, which is lightweight and cost-effective, often used in applications where weight is a concern, such as furniture assembly or aerospace components. For projects requiring higher strength, steel rivet nuts (non-stainless) are also available, though they may be more prone to rust in harsh conditions. Additionally, some rivet nuts are made from brass or plastic, offering unique properties like electrical conductivity or flexibility for specialized uses. Selecting the right material depends on factors like environmental conditions, load requirements, and the type of material being fastened.

What Size and Type Rivet Nuts Are Available

Rivet nuts come in a wide range of sizes and types to accommodate various applications, from small-scale repairs to heavy-duty industrial projects. In terms of sizes, rivet nuts are typically available in metric sizes ranging from M3 to M12, where the "M" number indicates the thread diameter (e.g., M3 for 3mm, M6 for 6mm, M12 for 12mm). They are also available in imperial sizes, such as 1/4-20, 5/16-18, or 3/8-16, commonly used in regions like the United States. Smaller sizes like M3 rivet nuts are ideal for lightweight applications, such as electronics or thin plastic panels, while larger sizes like M12 rivet nuts are better suited for heavy-duty tasks, such as construction or automotive assemblies

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