Normally something is only considered radioactive if it exceeds a specified rate. So if it does not exceed the specified rate it should be acceptable. Many items are radiactive but don't have flashing lights and bells around them i.e. gauges (already mentioned), smoke alarms (thats why it is not good to pull them apart, or kids eat them ), Iroquois intake casings (a pet hate) etc etc
It may not be emitting as the shell of the component may be sufficient to shield it. So if its not broken open its safe.
So just need to find the limits of where you are going. I would think in the long term if you dont need those bits I would be replacing them with something else as they may corrode and puncture.
You need to get the hard facts as whenever you mention radioactive and even magnetism, public servant's and desk sitter's auto response is always 'NO'. Mostly because they don't have a clue.
If you PM where you are taking it or where it is I may be able to get the regulations for that coutry but most follow the ICRP (International Commission of Radiological Protection). Normally there will be an exemption table..
I was going to post the table in here but its in word, so too many words. I'll try to pdf it as also has one for gauges, watches etc.