Blueblaze, ditto! I carry the Southco latches and a few of the roller catches in my tool box on board. I do think, however, the Southco latches are better to keep the drawers/doors closed tight and would serve better in an emergency. I just ordered a half dozen from Amazon a couple of years ago and am now down to two. I prefer the five pounders because the ten pounders are just too tough to open if used on a compartment you are in and out of often. I bet in the five years we have now had our PC (fifth anniversary of ownership the fifth of September

) I have replaced at least ten of the Southco latches altogether. When I use the roller latches from HD, Lowes, Walmart etc., I use two of them per cabinet or drawer for extra grip and assurance.
It is not just the Southco latches, either. I replaced every latch we had on a 2007 Roadtrek after about five years. They were those nice recessed Blum (made in Austria) high powered cabinet latches you find in top quality residential cabinets. The Roadtrek drawer and door fronts on those models were solid maple back then.
Great to have the info on the screen door latch because mine is getting a little iffy.
Paul