ISO 16047:2005/Amd 1:2012

Overview

ISO 16047:2005/Amd 1:2012 is an important international standard issued by the International Organization for Standardization (ISO) that provides an amendment to the original ISO 16047:2005. This standard focuses on the testing of fasteners, specifically concerning torque and clamp force measurement. The amendment refines testing protocols to ensure compliance with updated technical requirements linked to fasteners used in mechanical assemblies.

This standard is maintained by ISO technical committee ISO/TC 2, subcommittee SC 12, which specializes in metric internal thread fasteners. The amendment clarifies references to related standards for fasteners and revises clause details on the scope and relevant normative documents.

Key Topics

The amendment ISO 16047:2005/Amd 1:2012 addresses key areas in fastener torque/clamp force testing, ensuring accurate and reliable evaluation of fastening components' mechanical performance. Important aspects include:

• Torque/Clamp Force Testing Procedures: Defines methodologies to measure the torque applied and corresponding clamp force generated by fasteners.
• Scope Clarification: Limits the application to fasteners conforming to ISO 898-1 and ISO 898-2, excluding certain types such as self-tapping screws.
• Updated Normative References: Removes references to ISO 898-6, streamlining related test specifications applicable to fasteners.
• Test Parameter Adjustments: Modifies symbols and designations related to clamp force measurement (e.g., Fp values) to align with the revised applicable fastener standards.

These refinements enhance the accuracy and consistency of fastener testing results, which are critical for mechanical design validation and quality assurance processes.

Applications

ISO 16047:2005/Amd 1:2012 serves as a vital guideline for:

• Manufacturers of Fasteners: Ensuring their products meet strict international testing standards for torque and clamp force characteristics.
• Automotive and Aerospace Industries: Where reliable fastening under variable loads and environments is essential for safety and performance.
• Mechanical Engineering and Assembly Lines: For quality control and verification of threaded fastener components during production and maintenance.
• Testing Laboratories: Standardizing test methods and equipment calibration for accurate measurement of fastener torque and preload.

By utilizing this updated standard, industries can achieve better control over joint integrity, reduce failure risks, and enhance the longevity of assembled products.

Related Standards

This amendment references and aligns with several key ISO standards related to fastener performance and quality:

• ISO 898-1: Mechanical properties of fasteners made of carbon steel and alloy steel - Part 1: Bolts, screws and studs.
• ISO 898-2: Mechanical properties of fasteners - Part 2: Nuts with specified proof load values.
• Previous references to ISO 898-6 have been removed, reflecting changes in application scope.

Organizations applying ISO 16047 amendments should ensure compatibility with these referenced standards for comprehensive fastener testing and certification.

Keywords: ISO 16047 amendment, fasteners torque testing, clamp force measurement standards, metric thread fasteners, ISO fastener testing, mechanical fastener quality, ISO 898-1, ISO 898-2 compliance