What are fastener standards? Which standard should you choose for your application?

Understand DIN, JIS, ANSI, and ISO standards for screws, nuts, and bolts, including how to choose the right fastener standards for industrial applications, machinery, and engineering projects.

In industrial, engineering, and machinery applications, fastener standards play an important role in ensuring that screws, nuts, and bolts are safe, durable, and precisely compatible with various types of equipment.

Many people may have seen markings such as DIN, JIS, ANSI, or ISO on screws and bolts but may not fully understand what they mean, how they differ, or which standard should be selected for specific machinery or structural applications.

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What are fastener standards?
What are DIN, JIS, ANSI, and ISO standards?
How to Choose the Right Fastener Standard for Your Application?
FAQ
Summary

What are fastener standards?

		Fastener standards are... Fastener standards are international technical specifications established by various standard organizations to provide guidelines for the design, manufacturing, and testing of fastening components such as bolts, screws, nuts, rivets, and washers. These standards ensure that the dimensions, shapes, thread types, materials, and strength grades of fasteners remain consistent. As a result, fasteners manufactured by different factories or even from different countries can be assembled together accurately and safely.

What are DIN, JIS, ANSI, and ISO standards?

What are DIN, JIS, ANSI, and ISO Standards?

DIN

What is DIN?

DIN (Deutsches Institut für Normung) is the German industrial standard,highly popular in engineering fields requiring high strength and industrial applications worldwide.

Highlights of the DIN Standard

•High precision and accuracy	•Popular in Europe & modern factories
•Supports heavy industrial work	•Clear and detailed specifications

JIS

What is JIS?

JIS (Japanese Industrial Standards) is the industrial standard from Japan, widely used in Japanese machinery and equipment. It is commonly found in manufacturing due to the widespread use of Japanese equipment.

Highlights of the JIS Standard

•Perfect for Japanese machinery	•Popular in Asian industrial sectors
•Specific sizes & unique threads	•Supports precision & production

ANSI

What is ANSI?

ANSI (American National Standards Institute) is the industrial standard from the United States. ANSI standards are typically used with the imperial/inch system and are commonly found in American machinery or equipment.

Highlights of the ANSI Standard

•Supports US industrial needs	•Ideal for heavy duty & large machines
•Standardized on the inch system	•High-precision tolerance system

ISO

What is ISO?

ISO (International Organization for Standardization) is a globally recognized standard. It is highly popular because it unifies fastener manufacturing and application requirements across the globe.

Highlights of the ISO Standard

•Globally accepted standard	•Applicable and used worldwide
•Supports diverse industrial applications	•Ensures high precision & alignment

How to Choose the Right Fastener Standard for Your Application?

Choosing the right fastener standard for applications such as screws, bolts, nuts, and anchors should primarily be based on the country of origin, machinery manufacturer, and type of industry.
It is also important to consider the measurement system, strength grade, material, and load requirements of the application to ensure maximum safety and cost efficiency.

FAQ

01	Can DIN and ISO standards be used interchangeably? Some items can be used interchangeably in certain cases, but the dimentions and specifications should always be checked carefully before use.

Which standard should be used for Japanese machinery?

In general, JIS standards should be used to ensure the thread type and dimensions match the machinery correctly.

03	What is the difference between ANSI and ISO? ANSI commonly uses the inch measurement system, while ISO mainly uses the metric system and is recognized as an international standard.

Are fastener standards important?

Yes, they are very important because they ensure proper load support and safe operation.

Summary

DIN, JIS, ANSI, and ISO are fastener standards that define the dimensions, thread types, and properties of screws, nuts, and bolts to ensure safe and precise performance. Choosing the right standard for your machinery and application helps reduce damage, improve safety, and extend the service life of equipment effectively.

If you are looking for standard fasteners for industrial applications, Boonsan Fastener is ready to provide expert advice and supply high-quality products for both B2B and B2C customers.