JIS B 1051 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
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(tensile strength, hardness, etc.) for a particular bolt class? Jis B 1051 2000 PDF - Scribd Japanese Standards Association (JSA) website: You can visit