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Fastener Standards Of The World

Fastener Standards Of The World

Published by Rusty Spanner on May 17th 2024

Just as different countries have their own unique customs and traditions, they also have their own fastener standards. sources fasteners from around the world, so it can be helpful to know what these abbreviations mean and how to read them.

Here’s a quick, helpful guide explaining some of the different governing boards for standardization, complete with examples of some of the uses you might find while shopping for metric specialty fasteners on



As mentioned in our previous blog post, ISO derives its name from the Greek word for ‘equal’ and embodies the ‘international’ aspect of its name, with 171 nations all over the globe having representative bodies as members. Since its foundation in 1947, this non-governmental organization headquartered in Geneva, Switzerland has created over 25,000 standards that cover numerous aspects of technology, management and manufacturing

Because of its ubiquity and extensive catalog of standards, you will find many listings on that feature corresponding ISO numbers. These include:

ISO 4162: Hex Flange Bolts with Reduced Wrench

ISO 7380-2: Socket Button Head Screws with Flange

ISO 7090: Form B Plain Washers



Before ISO united countries across the continents, the Berlin-based DIN began in 1917 and became officially recognized by the German government as the national standards body in 1975. Due to their comprehensive nature, DIN standards are widely recognized for identifying and classifying metric fasteners. However, DIN is now a member of ISO and the world is transitioning to primarily using ISO classifications.

As this happens, you will find some unique naming conventions within the DIN standards. These are:

  • DIN [number]: normal DIN standards
  • DIN EN [number]: for German version of other European countries’ standards
  • DIN ISO [number]: for German version of ISO standards carries an extensive range of fasteners conforming to DIN standards, from the most commonly used to some of the rarest that are hard-to-find anywhere else. Examples include:

IN 34800: External Six-Lobe Flange Bolt

DIN 14441: All Metal Self-Locking Exhaust Nuts

DIN 6921: Class 10.9 Hex Flange Bolts with and without Serrations

Some products list both standards like:

DIN 912 / ISO 4762: Socket Head Cap Screws

DIN 913 / ISO 4026: Flat Point Set Screw in Coarse & Fine Thread



JIS guidelines are unsurprisingly maintained by the Japanese Standards Association. The JSA was created in its modern form in 1946 and three years later, codified into law by the Industrial Standardization Law. JIS fasteners are often used with vehicles like automobiles, motorcycles or construction equipment made by brands like:

  • Toyota / Lexus
  • Honda / Acura
  • Nissan / Infiniti / Datsun
  • Isuzu
  • Mitsubishi
  • Yamaha
  • Kawasaki
  • Hitachi

JIS standards are listed in a format of a letter followed by a four-digit number. The standard most often seen on products stocked by BelMetric are part of the B division, which covers the field of Mechanical Engineering, including tools and machine tools.

You may encounter listings on such as:

JIS B-1189 (Hex Flange Bolts with Small Wrench for M8, M10X1.25 & M12X1.25)

JIS B-1190 (Hex Flange Nuts with Small Wrench; use with JIS B-1189)

JIS B-1181 (Small Wrench Hex Nuts )



The ASME began as a collective of innovative industrialists and barons of commerce back in 1880. One of its main goals has been promoting safety. Two incidents occurred in BelMetric’s home state of Massachusetts that prompted action from the ASME, leading to the creation of the Boiler and Pressure Vessel Code a decade later.

In more modern times, the ASME has also branched out into providing standards for nuclear components, helping to ensure that this volatile but powerful energy source remains secure and viable. The ASME also maintains numerous publications and journals on various subjects related to mechanical engineering and its practical and secure applications.

The ASME standard found on is :

ASME B18.2.5.M: 12-point Flange Bolt



Around the turn of the 20th century, automobile manufacturers became prevalent, and the engineers pioneering this new form of transportation wanted a free exchange of ideas in order to better their products. The resulting group, SAE, was founded in 1905 with electric vehicle pioneer William Ryker as its president, and chose as its vice president someone who would eventually have great success in the automobile industry: Henry Ford.

The group began as the Society of Automobile Engineers but took a new name in 1916; SAE member Elmey Sperry coined the term ‘automotive,’ to refer to any self-propelling vehicle, as the field of aviation was also gaining momentum. In the over 100 years of its existence, the SAE has expanded its scope to include publishing technical journals and supporting STEM learning programs to encourage the next generation of engineers.



NSI is unique amongst the groups mentioned here, simply because they do not develop and maintain their own standards. Instead, as their website puts it, the group “provides a framework for fair standards development and quality conformity assessment systems and continually works to safeguard their integrity.” They also act as an outreach group to coordinate that American-designed standards can be implemented and integrated on a global scale.



Another American institution–this one making its headquarters in the fastener haven of Cleveland, Ohio–the IFI represents the trade industry. It also coordinates with some of the other organizations here, and while it does not regularly make its own standards, it has developed some in response to industry needs or lack of other options. The IFI also offers comprehensive compendiums of fastener standards, as well as a variety of learning opportunities regarding all the facets of fasteners.