Otto Bock 17AD100 Nexgear Tango Technical Information page 23

Procedure
NOTE: To avoid damaging the fine thread, ensure
proper alignment and smooth movement while
screwing it in.
Use a Torx wrench to screw the spring holder into the
internal thread of the support element.
Set the torque wrench with bit extension onto the spring
holder and tighten it. Observe the specified torque.
Position the washer on the spring holder.
Insert the spring dummy into the module.
17AD100 23