Bolt selection for different rating in one spec

yes. we do the same.
For FLTH, you need to create the DTSE under CATE and its member DATA should have the Dkey 'FLTH' which is pointing towards your CATE flange thk parameter.

that's it simple.

yes. we do the same.
For FLTH, you need to create the DTSE under CATE and its member DATA should have the Dkey 'FLTH' which is pointing towards your CATE flange thk parameter.

that's it simple.