"I needed these to repair some problems on a gas locker door on a caravan. Whilst there is a rubber seal on the locker, the inside of the locker is prone to condensation when drawing LPG. This causes moisture to form on the outside of the gas bottle as the liquid gas cools when gas is being drawn off. The original BZP nuts had rusted because of this condensation, so stainless was the only option. And as a bonus they were in stock at my local store."
"Worked really well for fixing roof rack together as it had not come with fixings, only thing that would be better is just being able to buy in packs of 10 (like the bolts) as I now have 96 nuts I dont have a use for at the moment, better start planning next job"