Neutral Safety Switch connection loose

I've had a couple of plugs (can't remember the source offhand) that didn't fit the NSS very well (or is it the available NSSs don't fit the plug? Chicken or the egg...), even when new. My redneck solution? A half dozen wraps of electrical tape around the body of the NSS- the plug presses on snug now and has stayed for a pretty long time, although I still check it now and then...