bolt (cylinder spring)
Creates an RBODY elements and a zero length SPRING2N element.
Restriction: Only available in Radioss.
The Radioss bolt (cylinder spring) exists in exactly the same
configuration with the following additional names:
- HC deformable cylinder bolt
- HC deformable cylinder clip
This is in order to keep the realization names from HyperCrash.
This realization also the prop_radioss_rigidupdate.tcl property
script.