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Implantation bolts: Also known as stud bolts.
This is a standard that specifies the characteristics of steel implantation bolts that are commonly used.
The internal thread that fits into the implantation side is preferably 5H of the metric thread or grade 1.
The external thread on the nut side is 6g (or 2nd grade) of the metric thread.
JIS B １１７３
* Since the gauge is not specified by JIS, the manufacturer's own dimensional tolerance is adopted.
* For certain users, such as automobile manufacturers, it is necessary to check because they may have adopted their own standards.