Like the international ISO system, JIS B1051 uses a two-digit numbering system (e.g., 4.6, 8.8, 10.9, 12.9) to define the strength profile of a fastener.
The JIS B 1051 standard (the latest major revision being JIS B 1051:2014) defines the mechanical and physical properties of steel fasteners with coarse and fine pitch threads. It is harmonized with the international standard , meaning the technical contents are largely identical. Key Mechanical Properties Defined
If you need a specific table of tensile strength values for class 10.9 or 12.9 fasteners, I can provide those. Or, if you are looking for the equivalent standard for nuts (JIS B1052), I can help with that as well. Jis B 1051 2000 PDF - Scribd
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 . jis b1051 pdf free
What or bolt size (e.g., M10 Grade 10.9) are you designing for?
Applies to bolts/screws with metric coarse threads (M1.6 to M39) and fine threads (
Applies specifically to nominal sizes from M1.6 up to M39 . Like the international ISO system, JIS B1051 uses
Examines the surface of heat-treated fasteners (classes 8.8 to 12.9) to ensure carbon loss during heating has not weakened the thread surfaces. Finding a JIS B1051 PDF: Risks of Free Downloads
Engineers and procurement specialists frequently search for a download to quickly cross-reference strength requirements and material compatibility during the design phase.
JIS B 1051 is technically aligned with ISO 898-1, meaning the mechanical properties and test methods are largely identical. However, JIS B 1051 may have some country-specific notes or modifications that make it the required standard for use in Japan or for Japanese-designed products. Key Mechanical Properties Defined If you need a
The current 2014 standard is available from the Accuris Standards Store or ANSI Webstore . 2. Key Details of JIS B 1051:2014
While initially less straightforward, it is a reliable process. Here is a step-by-step guide:
Coarse pitch thread M1.6 to M39, and fine pitch thread M18 × 1 to M39 × 3.
The only way to guarantee authenticity, security, and legal compliance is to acquire JIS B1051 from its official publisher.
Because JIS B1051 is designed to be in conformity with (Mechanical properties of fasteners made of carbon steel and alloy steel), they are largely interchangeable for property classes.