Rivet Nut Standard - Rivet Nut ISO Standard and DIN Standard
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When selecting rivet nuts for your project, understanding the rivet nut standard that govern their design and performance is crucial. Two of the most widely recognized standards are the ISO and DIN standards, which define the dimensions, materials, and performance criteria for rivet nuts.
In this blog, we will explore the key differences between the Rivet Nut ISO standard and the DIN standard. Helping you make an informed decision on which standard to follow for your application.
Table of Contents
What is Rivet Nut Standard?
A rivet nut standard defines specifications for dimensions, materials, installation methods, and performance characteristics of rivet nuts. These standards ensure rivet nuts are consistent, reliable, and suitable for various applications and industries.
The Common Types of Rivet Nut Standards
Rivet nut standards ensure that rivet and nuts are consistent, reliable, and suitable for their intended application. They cover everything from dimensions, materials, and threads to mounting methods and performance characteristics. This provides manufacturers and users with a set of guidelines to ensure quality and performance.
Standards help achieve compatibility between fasteners and ensure that rivet nuts work properly under different conditions. It is essential to achieve compatibility between different fasteners and to ensure the expected performance of rivet nuts under various conditions.
1. Dimensional Specifications
- Thread Size: Defines the type and size of threads (e.g., M6, M8, 1/4-20) for compatibility with bolts or screws.
- Head Style: Defines the type of head (flat, countersunk, or flanged) for aesthetic or functional requirements.
- Grip Range: The minimum and maximum material thickness that the rivet nut can effectively accommodate. The grip range ensures the rivet nut can fasten a variety of materials securely within these thickness limits, achieving optimal strength and performance.
M6: Grip range 1 mm – 5 mm
M8: Grip range 1.5 mm – 6 mm
M10: Grip range 2 mm – 8 mm
M12: Grip range 3 mm – 10 mm
2. Material Specifications
| Material | Tensile Strength | Shear Strength | Corrosion Resistance | Applications |
| Steel | 1,200 – 2,000 N | 1,000 – 1,500 N | Good, but needs coating to prevent corrosion | Heavy-duty, high-strength applications (automotive, aerospace) |
| Stainless Steel | 1,500 – 3,000 N | 1,200 – 2,500 N | Excellent, ideal for harsh environments | Corrosive environments, high-strength applications |
| Aluminum | 200 – 500 N | 150 – 350 N | Good, but less resistant than steel or stainless | Lightweight applications (electronics, automotive interiors) |
| Copper | 400 – 1,000 N | 300 – 800 N | Good, but more prone to oxidation | Low-strength, electrical connections, high thermal conductivity |
3. Threading Standards
a. Thread Pitch:
Thread Pitch refers to the distance between adjacent threads on a screw, bolt, or rivet nut. It plays a crucial role in determining the compatibility of fasteners and ensuring secure connections. Thread pitch is typically measured in two ways:
- Metric Threads: In metric systems, the thread pitch is measured in millimeters and represents the distance between threads. For example: M5 x 0.8: “5” is the outer diameter in millimeters, and “0.8” is the distance between adjacent threads (in mm).
- Unified Threads (UNC/UNF): For Unified threads, such as those used in the US, thread pitch is expressed in threads per inch (TPI). For example: 1/4″-20: This indicates a 1/4-inch diameter bolt with 20 threads per inch.
b. Thread Type:
- Metric Thread: Common in global applications, with thread types such as M5, M6, M8, and so on. These are compatible with metric screws and bolts.
- Unified Thread (UNF): Found mostly in the US, with examples like 1/4″-28 and 3/8″-24. UNF threads are used with fine thread screws and bolts.
- Unified Thread (UNC): Also common in the US, with thread sizes like 1/4″-20 and 3/8″-16. UNC threads are used for coarse-thread screws and bolts.
- British Standard Thread (BSP): Commonly used for plumbing and fluid connections, with sizes such as 1/2″ and 3/4″ for compatibility with British plumbing fittings.
- Self-Tapping Thread: These threads are used in applications where the rivet nut is installed into material without pre-tapped holes. Thread sizes like #8 or #10 are common in this type.
4. Performance Standards
Rivet nuts performance standards ensure that rivet nuts meet the required mechanical properties and quality benchmarks for specific applications. These standards govern the rivet nut strength, durability, and reliability of rivet nuts in various industries.
Some key performance standards for rivet nuts include:
| Performance Standard | Description | Typical Values |
| Tensile Strength | Maximum load along the axis before failure | 1,200 – 3,000 N (depending on material) |
| Shear Strength | Resistance to forces attempting to shear the nut | 1,000 – 2,500 N |
| Pull-Through Strength | Resistance to being pulled out of the base material | 1,000 – 3,000 N |
| Corrosion Resistance | Ability to withstand environmental exposure | Stainless steel: 5-10 years in harsh conditions |
| Vibration Resistance | Ability to withstand vibrations without loosening | Good for up to 10,000 cycles (depending on material) |
5. Industry Standards
Common rivet nut standard is provided by organizations such as:
- ISO (International Organization for Standardization) – for international standards (e.g., ISO 16047 for rivet nut dimensions).
- DIN (Deutsches Institut für Normung) – German standard for fasteners.
- ANSI (American National Standards Institute) – American standard for industrial products.
- JIS (Japanese Industrial Standards) – Japanese rivet nut standard.
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What is the ISO Standard for Rivet Nuts?
The ISO （International Organization for Standardization）standards for rivet nuts primarily focus on the dimensions, materials, mechanical properties, and testing methods to ensure the consistency and reliability of rivet nuts in various applications. Below are some of the key ISO standards related to rivet nuts:
1. ISO 15971: Fasteners – Rivet Nuts – Design and Performance
- This rivet nut standard outlines the design and performance requirements.
- It covers specifications for the materials, thread forms, strength, and installation conditions.
- The standard specifies the minimum and maximum allowable dimensions, including head diameter, body length, thread size, and grip range.
2. ISO 6892-1: Metallic Materials – Tensile Testing – Part 1: Method of Test at Room Temperature
- This standard is essential for testing the tensile strength of the materials used in rivet nuts.
- It helps determine the performance of rivet nuts when subjected to axial forces.
3. ISO 8992: Metal Fasteners – Test Methods for Rivet Nuts
- Specifies test methods for determining the shear strength, pull-out strength, and other mechanical properties of rivet nuts.
- Includes testing methods for evaluating performance under static and dynamic loading conditions.
4. ISO 898-1: Mechanical Properties of Fasteners – Part 1: Bolts, Screws, and Studs
- Though it primarily focuses on bolts and screws, this standard also applies to rivet nuts used in conjunction with fasteners.
- It specifies mechanical properties such as tensile strength, hardness, and yield strength for rivet nuts when they are part of a fastening system.
5. ISO 3211: Fasteners – Hexagon Rivet Nuts
This standard focuses on hexagon-shaped rivet nuts and their specific requirements, including dimensions, materials, and mechanical properties.
What is the DIN Standard for Rivet Nuts?
The DIN (Deutsches Institut für Normung) standards for rivet nuts include various specifications that address dimensions, materials, and performance requirements. The most commonly referenced DIN standards for rivet nuts are:
1. DIN 7337 - Rivet Nuts for Blind Holes
- This rivet nut standard defines the dimensions, material properties, and strength requirements used in blind holes.
- Specifies requirements for internal threads, flanged bodies, and installation techniques. Covers both metric and inch threads.
2. DIN 7338 - Fasteners – Rivet Nuts – Testing Methods
- Establishes testing methods for rivet nuts to assess their tensile, shear, and pull-out strengths, ensuring the fasteners meet performance requirements under various conditions.
- Details procedures for mechanical testing of rivet nuts to guarantee high-performance standards.
3. DIN EN 26216 - Rivet Nuts for Use in Aerospace Applications
- This standard applies to rivet nuts used in the aerospace industry, emphasizing performance in high-stress environments.
- Focuses on material properties, thread sizes, and mechanical testing for use in aviation and space sectors.
4. DIN 7500-1 - Tolerances for Rivet Nuts (External and Internal Dimensions)
- Defines the tolerance levels for the external and internal dimensions of rivet nuts to ensure compatibility with standard fasteners and tools.
- Specifies allowable tolerances for key dimensions to ensure ease of installation and functionality.
5. DIN 267-13 - Fasteners – Materials – Part 13: Rivet Nuts
- This standard addresses the materials used in the manufacture of rivet nuts, ensuring they meet durability and performance standards for various applications.
- Covers material grades, corrosion resistance, and other properties relevant to the longevity and strength of rivet nuts.
What is the Difference Between Rivet Nut ISO Standard and DIN Standard ?
| Aspect | ISO Standard | DIN Standard |
| Origin | International Organization for Standardization | Deutsches Institut für Normung (German Institute for Standardization) |
| Global Reach | Widely adopted globally across various industries | Primarily adopted in Germany and Europe |
| Scope | International alignment, covering different industries | Focused more on German and European engineering practices |
| Technical Specifications | General specifications, with broad guidelines | More detailed, specific tolerances and mechanical properties |
| Adoption and Compliance | Adopted by multinational corporations across industries | Common in Germany and European countries, specific to local engineering |
- The ISO Standard for rivet nuts is globally recognized and provides broad guidelines applicable across industries.
- The DIN Standard, on the other hand, is more detailed, with specific technical tolerances, primarily used in Germany and Europe.
While both standards ensure reliable fasteners, the ISO standard has wider international adoption, whereas DIN is more focused on European engineering practices.
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How to Choose the Right Standard of Rivet Nut?
Choosing the right rivet nut standard depends on various factors such as the geographical location of your project, industry requirements, and specific application needs. By considering these factors, you can ensure the rivet nut you choose will meet the necessary quality, compatibility, and performance standards for your application.
1.Geographical Location
- If you’re working internationally or in markets outside of Europe, the ISO standard is typically the best choice due to its global recognition and broad adoption.
- In Europe, especially Germany, the DIN standard is commonly used and often preferred for engineering and manufacturing applications.
2. Industry Requirements
- Some industries (e.g., automotive, aerospace) may have specific preferences or requirements for either ISO or DIN standards based on regulatory compliance and performance expectations.
- Review any standards or certifications your industry requires before making a selection.
3. Material and Performance Needs
- ISO standards generally cover a wide range of materials and are suitable for most applications.
- DIN standards may offer more detailed specifications for tolerances, which can be crucial for high-precision or heavy-duty applications where exact measurements and durability are essential.
4. Thread Type and Pitch
Choose the appropriate ISO or DIN specification based on the type of threads (e.g., metric, UNF, UNC) that best fit your application needs.
5. Manufacturer Capabilities
Some manufacturers may only produce rivet nuts according to ISO or DIN standards, so ensure the selected standard aligns with the available products in your supplier’s catalog.
Why Follow Rivet Nut Standards?
1. Consistency and Reliability:
Adhering to established standards (such as ISO or DIN) ensures that rivet nuts meet consistent quality and performance criteria. This guarantees reliable performance and predictable results across different manufacturers and applications.
2. Compatibility
Rivet nuts are often used alongside other fasteners and components. By following standardized specifications for threading, material, and dimensions, you ensure that rivet nuts are compatible with other parts, reducing the risk of misfits or failures.
3. Safety
Rivet nuts that meet industry standards are tested for strength, durability, and resistance to environmental factors (e.g., vibration, corrosion). This improves the safety of the finished product by ensuring that fasteners will perform properly under stress and in harsh conditions.
4. Regulatory Compliance
In many industries, especially those related to automotive, aerospace, and construction, adherence to specific standards is a requirement for regulatory compliance. Using certified rivet nuts ensures that your products meet safety, performance, and quality guidelines.
5. Improved Durability and Performance
Standardized rivet nuts are designed to handle specific loads, vibrations, and environmental conditions, ensuring that your connections are strong and durable. This reduces the risk of failure and extends the lifespan of your assembly.
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Our factory manufactures 400 million pieces of structural rivets and automobile blind rivets, 1 billion standard blind rivets annually now. We can select the most suitable fasteners according to your project needs, and provide product customization services. Choose Rivetfix for your next project and experience the difference that superior rivet nut solutions can make.
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