BS ISO 965-5:1998+A1:2021 - ISO General Purpose Metric Screw Threads

Introducing the BS ISO 965-5:1998+A1:2021, a comprehensive standard that defines the tolerances and limits of sizes for internal screw threads designed to mate with hot-dip galvanized external screw threads. This standard is essential for ensuring compatibility and precision in applications where galvanized threads are used, providing a reliable guideline for engineers, manufacturers, and quality assurance professionals.

Key Features

• Standard Number: BS ISO 965-5:1998+A1:2021
• Pages: 14
• Release Date: July 26, 2021
• ISBN: 978 0 539 14528 1
• Status: Standard

Overview

The BS ISO 965-5:1998+A1:2021 standard is a critical document for industries that rely on the precise fitting of screw threads, particularly in environments where corrosion resistance is paramount. This standard provides detailed specifications for the tolerances and limits of sizes for internal screw threads, ensuring they are compatible with hot-dip galvanized external screw threads. The focus on the maximum size of tolerance position 'h' before galvanizing is crucial for maintaining the integrity and functionality of threaded connections.

Why Choose This Standard?

Choosing the BS ISO 965-5:1998+A1:2021 standard means opting for precision, reliability, and quality. This standard is designed to meet the needs of various industries, including construction, automotive, and manufacturing, where the durability and fit of screw threads are critical. By adhering to this standard, you can ensure that your products meet international quality benchmarks, reducing the risk of failure and enhancing customer satisfaction.

Applications

This standard is applicable in a wide range of industries and scenarios, including:

• Construction: Ensuring the structural integrity of buildings and infrastructure by using compatible screw threads.
• Automotive: Providing reliable connections in vehicles where safety and performance are paramount.
• Manufacturing: Facilitating the production of high-quality machinery and equipment with precise thread fittings.
• Engineering: Supporting the design and development of innovative solutions with standardized thread specifications.

Benefits

Adopting the BS ISO 965-5:1998+A1:2021 standard offers numerous benefits, including:

• Enhanced Compatibility: Ensures that internal and external threads fit seamlessly, reducing the risk of misalignment and failure.
• Improved Durability: The focus on hot-dip galvanized threads provides superior corrosion resistance, extending the lifespan of your products.
• Global Recognition: As an ISO standard, it is recognized and respected worldwide, facilitating international trade and collaboration.
• Quality Assurance: Adhering to this standard demonstrates a commitment to quality, boosting customer confidence and satisfaction.

Conclusion

The BS ISO 965-5:1998+A1:2021 standard is an indispensable resource for professionals seeking to ensure the precision and reliability of screw thread connections. With its detailed guidelines and international recognition, this standard is a valuable asset for any organization committed to quality and excellence. Invest in this standard to enhance your products, streamline your processes, and achieve superior results in your industry.

BS ISO 965-5:1998+A1:2021

This standard BS ISO 965-5:1998+A1:2021 ISO general purpose metric screw threads. Tolerances is classified in these ICS categories:

• 21.040.10 Metric screw threads

This part of ISO 965 specifies limit deviations and limits of sizes for pitch and crest diameters for ISO general purpose metric internal screw threads conforming to the coarse thread series of ISO 262 (from M8 to M64) having basic profile according to ISO 68‑1.

Internal screw threads according to this part of ISO 965 are intended to mate with external screw threads with maximum size of tolerance position h before hot-dip galvanizing.

Internal threads shall be tapped after the hot-dip galvanizing process has been completed, therefore no galvanizing coating is present on the surface of internal threads.

Products made with thread tolerances according to this part of ISO 965 may show load failure when tested in accordance with ISO 898‑2 without adjustment of the other mechanical properties.

Internal screw threads with thread tolerances according to this part of ISO 965 must not be mated with external screw threads having thread tolerances according to ISO 965‑4 because such combinations will create severe risk of thread stripping.

NOTE Internal screw threads with tolerance class 6AZ are primarily intended to mate with external screw threads centrifuged after hot-dip galvanizing.

Internal screw threads with tolerance class 6AX are primarily intended to mate with hot-dip galvanized external screw threads with heavy coating not centrifuged.