In the process of climbing the transmission tower, the step bolt or bolt is used as the safety measure.
Step integral loop line operator hook into safety precautions.
Provide an ASTM A563-DH heavy hex nut.
With alloy steel forging.
Its surface is hot dip galvanizing treatment A153 to meet the ASTM specification.
The material meets C1045 and Q345 needs to be tested with low tamperature summer ratio.