seizing just means you thread it on so tight that you physically cannot remove it without the use of a tool or lubricant or something of that nature.
it's a common problem with say, automotive bolts or nuts or something of that nature, but is very plausible for anything involving threads. just don't thread them on too tight and you'll be fine. thread it on till you can feel it "stop", after that point you would have to use a good amount of force to continue threading and that's when you run into territory that you could possible force it to "lock" or "seize".