Rivnut and Nutserts

Rivet nuts, also known as blind nuts or threaded inserts, and nutserts, commonly referred to as threaded inserts with a knurled body, are specialized fasteners designed to provide strong and reliable threads in thin or non-traditional materials. They are tubular in shape, open on one end, and internally threaded. Rivet nuts are typically installed from one side of the material using various methods, while nutserts are installed using a tool that expands the knurled body to grip the material from both sides, providing a secure and threaded hole. These inserts are widely used in applications where the rear side is inaccessible or where welding, tapping, or other fastening methods are not viable.

Types of Rivet Nuts and Nutserts

Rivet nuts and nutserts come in various types, each suited for specific applications and materials. Some common types include:

Standard Rivet Nuts: These are general-purpose rivet nuts used in a wide range of applications. They are available in various thread sizes and materials.
Reduced Shank Rivet Nuts: These rivet nuts have a reduced shank diameter, making them suitable for applications with limited space.
Countersunk Head Rivet Nuts: These rivet nuts feature a countersunk head design for a flush finish when installed.
Half Hex Rivet Nuts: These rivet nuts have a half-hexagonal body, allowing them to be installed with a standard open-end wrench.
Round Body Rivet Nuts: These rivet nuts have a round body and are commonly used in soft or brittle materials.
Flanged Rivet Nuts: These rivet nuts have a flanged head that provides increased bearing surface and pull-through resistance.
Thread-Sert Nutserts: These nutserts have a smooth body, making them suitable for applications where minimal protrusion is required.
Hex Body Nutserts: These nutserts have a hexagonal body for easy installation with a standard wrench.
Thin Wall Nutserts: These nutserts have a thin wall, making them ideal for applications with limited space or thin materials.

Materials for Rivet Nuts and Nutserts

Rivet nuts and nutserts are manufactured from various materials, each chosen based on factors such as strength, corrosion resistance, and application requirements. Common materials include:

Steel: Steel rivet nuts and nutserts offer excellent strength and are suitable for various industrial applications.
Stainless Steel: Stainless steel rivet nuts and nutserts provide superior corrosion resistance, making them ideal for outdoor and marine applications.
Aluminum: Aluminum rivet nuts and nutserts are lightweight and corrosion-resistant, often used in aerospace and automotive industries.
Brass: Brass rivet nuts and nutserts offer an aesthetically pleasing finish and are commonly used in decorative and antique-style applications.
Zinc Alloy: Zinc alloy rivet nuts and nutserts provide a balance of strength and cost-effectiveness, making them versatile for different applications.

Rivet Nuts and Nutserts Applications

Rivet nuts and nutserts find applications in various industries and settings, including:

Automotive: Rivet nuts and nutserts are widely used in automotive applications, such as securing interior panels, wheel arch liners, and trim pieces.
Aerospace: These inserts are used in aerospace applications for joining lightweight materials and components.
Electronics: Rivet nuts and nutserts are employed in electronics to provide secure and reliable threads for various enclosures and components.
Furniture: These inserts are used in furniture assembly for joining panels and components.
Sheet Metal Fabrication: Rivet nuts and nutserts are commonly used in sheet metal fabrication to create strong and reliable connections.
Marine: These inserts are utilized in marine applications for securing components and panels in a corrosive environment.
Construction: Rivet nuts and nutserts find use in construction projects for joining architectural elements and components.
Renewable Energy: These inserts are used in wind turbines and solar panels for assembly and maintenance purposes.

Installation Methods

The installation of rivet nuts and nutserts involves specific methods and tools, depending on the type and application. Common installation methods include:

Rivet Nut Installation: Rivet nuts are installed using tools like hand or pneumatic tools with mandrels that pull the rivet nut into the material, causing it to deform and grip the material securely.
Nutsert Installation: Nutserts are installed using a dedicated tool, commonly known as a nutsert tool or rivet nut setter. The tool expands the knurled body of the nutsert, securing it in the material from both sides.

Advantages of Rivet Nuts and Nutserts

Rivet nuts and nutserts offer numerous advantages, making them a preferred choice for secure fastening solutions:

Strong and Reliable: These inserts provide strong and reliable threads in thin or delicate materials.
Access from One Side: Rivet nuts and nutserts allow for installation from one side of the material, making them ideal for applications with limited access.
Versatile: With a wide range of thread sizes, types, and materials available, rivet nuts and nutserts cater to diverse applications and industry needs.
Cost-Effective: Rivet nuts and nutserts offer a cost-effective alternative to welding or tapping, reducing assembly time and labor costs.
Corrosion Resistance: Stainless steel and aluminum rivet nuts and nutserts provide excellent corrosion resistance, ensuring long-lasting performance, especially in outdoor or marine environments.
Increased Load-Bearing Capacity: Rivet nuts and nutserts distribute the load over a larger surface area, enhancing the load-bearing capacity of the joined materials.
Wide Range of Applications: These inserts are suitable for use in various materials, such as metal, plastic, composites, and even some ceramics.
Minimal Damage to Parent Material: The installation process of rivet nuts and nutserts requires minimal material displacement, minimizing damage to the parent material.
Quick Installation: Using appropriate installation tools, rivet nuts and nutserts can be installed rapidly, improving production efficiency.
Reusable: In certain applications, rivet nuts and nutserts can be removed and reused, making them a practical choice for prototype assemblies or temporary fixtures.
No Surface Markings: Unlike other fastening methods, rivet nuts and nutserts do not require surface markings or protruding fastener heads, providing a clean and aesthetically pleasing finish.

Conclusion

In conclusion, rivet nuts and nutserts are essential threaded inserts that provide secure and reliable fastening solutions for a wide range of applications. Their versatility, strength, and ease of installation make them preferred alternatives to traditional nuts and bolts, especially in situations where access to the rear side of the material is limited. From automotive and aerospace to electronics and construction, rivet nuts and nutserts play a crucial role in joining components and materials, contributing to the efficiency and reliability of various industrial projects. With a variety of types, materials, and installation methods available, rivet nuts and nutserts offer tailored solutions for different applications and industry requirements. Manufacturers continue to invest in research and development to enhance the performance and range of these threaded inserts, catering to the evolving needs of modern industrial applications. As industries strive for lightweight designs, efficient assembly processes, and increased durability, rivet nuts and nutserts will remain indispensable components, ensuring secure and reliable connections in countless projects and assemblies.