Well tightened being the important phrase here. I had loosening problems on mine, a Basso frme with a Campag *** style sealed BB (non-splined). I originally installed it with a tool that looked kind of like an old type right hand cup remover but with a short (approx 150mm) handle. Dang thing came loose a couple of times even with loctite. Maybe I didn't use enough. But I went to the suppliers who gave me a tool that slid over the BB from the side and grabbed it, that had flats to attach a big mo-fo adjustable wrench. No problems since.