Manufacturers like NBK and Miki Pulley offer free detailed technical tables derived from JIS B 1051. These include essential data on tensile strength, yield points, and hardness for various property classes (e.g., 8.8, 10.9, 12.9).
You can find the standard listed on sites such as Scribd (JIS B 1051:2014) or purchase it from DIN Media .
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is the Japanese Industrial Standard that specifies the mechanical and physical properties of fasteners (bolts, screws, and studs) made of carbon steel and alloy steel. The current version of this standard is JIS B 1051:2014 , which is technically identical to the international standard ISO 898-1:2013 . Core Technical Specifications
The core utility of the JIS B1051 standard lies in its classification system. Fasteners are marked with two numbers separated by a dot (e.g., 8.8, 10.9, 12.9), known as the . Manufacturers like NBK and Miki Pulley offer free
JSA Web Store (search "B1051").
: Specifies mechanical and physical properties when tested at ambient temperatures (10°C to 35°C). Previous Versions : Significant revisions occurred in 1991 and 2000. Core Content of JIS B 1051
Last updated: May 2026. Always check the JSA web store for the latest revision of JIS B1051. Are you comparing this standard to or ASTM specifications
Jis B1051 plays a crucial role in ensuring the quality and reliability of fasteners used in various applications. The standard helps manufacturers, suppliers, and users to ensure that the fasteners meet the required specifications and performance standards. This, in turn, contributes to the overall safety and efficiency of products and structures.
The safest approach involves using the free resources described above for research purposes and purchasing the official standard when precise technical data is required.