Latch coming apart on plastic tub on 400

Just a heads up on a close call we had while on an extended trip with our 400. We had just left East Glacier and pulled off after a couple miles to assure we had secured everything. My DW noticed the tub lid was not locked, after a quick look the screw which holds the latch hook and the latch hook had fallen off.  Luckily, I had put a lexan bottom on the tub which captured the loose parts.  I reassembled the latch and tightened the screw.  The fix worked for another 2500 miles when I noticed it was loosening up again. Bottom line is that the screw needs some medium hold Locktite. I would recommend that as a preventative measure that others do the same.