JIS B 7420 is a standard for torque wrenches, which are used to apply a specific amount of torque to a fastener or a bolt. The standard covers the calibration and adjustment of torque wrenches, ensuring that they are accurate and reliable.
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The standard applies to torque wrenches used for tightening or loosening bolts, nuts, and other fasteners. It covers torque wrenches with a range of 10 N·cm to 10 000 N·m. JIS B 7420 is a standard for torque
JIS B 7420 is a Japanese Industrial Standard (JIS) that specifies the requirements for the calibration and adjustment of torque wrenches. Here is a summary of the standard: jis b 7420 pdf