最終更新日:2022/12/24
When the bolt and nut are tightened, the protrusions are flattened, either by contact with the bolt head or the nut face washer, forming a gap by which accurate measurement of bolt tension can be made.
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When the bolt and nut are tightened, the protrusions are flattened, either by contact with the bolt head or the nut face washer, forming a gap by which accurate measurement of bolt tension can be made.