I am missing something....
If I understand correctly you have an issue with importing and converting an IFC (from Revit?) to Tekla and converting it to Tekla elements?
However the IFC you have send (outcoord.ifc) is coming from Tekla, not Revit. So you then have issues with importing an IFC made in Tekla, importing it back into Tekla? Or do you have another IFC made in Revit that you try to import in Tekla?
If I look at the default import IFC options in Revit I see this
So IFCMechanicalFastener are converted to Specialty Equipment

Which is indeed what i see hen opening the IFC file in Revit

What I also see is that the element in the IFC has a classification of IFCMechanicalFastenerType (assigned by Tekla)
In the case you have made a model in Revit and export it as IFC and then try to import it into Tekla then you might have a problem that Revit might not use the IFC class (i.e. IFCMechanicalFastenerType) that Tekla is expecting. You might try to force it by attaching the parameter IFCExportAs to your bolts and give it the value "IFCMechanicalFastenerType".
Further if it is a Tekla issue than you might have more success by contacting Tekla forums/support.
Louis

Please mention Revit version, especially when uploading Revit files.