My fuel strainer with screwdriver lives in my carry on bag all the time and surprisingly no problems yet! I'm sure I'll have to put up with an over zealous security fool at some point but I'll cross that bridge when I come to it!
And I'm sure someone will ask why I don't just check it in, personally my carry on bag contains everything I need to be able to go to work, headset, EFB, mounts, laptop etc... the stuff that if my checked in bag got lost I would be annoyed but I wouldn't have to call up the boss and tell him "Sorry, can't fly, no headset/licence/EFB..." which is why the strainer is in there. I've always figured worse case scenario I'll chuck out the screw driver bit if they're going to make a real fuss about it.