Special anchor bolts with nuts (tensioning mandrels) following drawing • test case, 8 sets of each type (mandrel + nut, mandrel + nut + pin) • Production series, 1000 sets of each type. The pin material must be hardened and tempered to the value shown in the drawing. The threads on the pin are rolled. The used material and heat treatment will be required protocol. The test version and the following series has to be manufactured using a same technological process EU Production only.