Hexagon bolts, socket head cap screws, studs, and other threaded steel fasteners.
: Evaluates the maximum stress the fastener can withstand before breaking.
Ensures the metal is uniform in hardness across its cross-section. jis b1051 pdf free
JIS B 1051 shares a close relationship with ISO 898-1, making it widely recognized and accepted in the international fastener industry. Many manufacturers can produce fasteners that simultaneously satisfy both Japanese and international standards, streamlining global trade and supply chains. When revisions were made to the international standard in 1978, JIS was subsequently revised for consistency.
NBK and Miki Pulley offer technical summaries and excerpts of JIS B 1051:2014 tables, which are highly useful for engineering data (tensile strength, hardness, torque). Hexagon bolts, socket head cap screws, studs, and
The standard covers fasteners with the following characteristics: ISO metric coarse and fine pitch threads.
Miki Pulley Co., a Japanese manufacturer, provides a practical excerpt of JIS B 1051:2000 on its technical data page. This free resource includes key tables for mechanical properties, hardness values, proof load stress, and elongation percentages, presented in a clear tabular format. JIS B 1051 shares a close relationship with
The numbers before and after the decimal point represent specific mechanical limits:
At its core, the standard classifies fasteners into distinct property classes. Property classes ranging from 3.6 to 12.9 are defined, with each class specifying the fastener's minimum tensile strength, yield strength, hardness, and elongation.
One reason engineers search for the JIS B1051 document is to find international cross-references. Because Japan heavily aligned its industrial standards with global bodies in recent decades, .
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