Out of curiosity, I used the output mesh from the OP’s model (with beam elements expanded to solids) in a new model.
test_bolt_v4_FZ+ exported mesh.pmx (1.4 MB)
Out of curiosity, I used the output mesh from the OP’s model (with beam elements expanded to solids) in a new model.
test_bolt_v4_FZ+ exported mesh.pmx (1.4 MB)