Studs combined with T-nuts DIN 508 (EH 23010./23020.), fixture nuts DIN 6330 (EH 23070.) and plain washers DIN 6340 (EH 23060.) become complete clamping studs.
For torques and strengths please refer to appendix - Technical Data -
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The stud has an internal hexagon additionally. This guarantees a fast and simple assembling and dismounting.