When I was at the sandblasters,they got a new stainless bottling machine,and bolted on plywood cover plates to give a shiny and frosted effect....... they .used stainless bolts......the bolts seized and wouldnt come out...........one of the blasters figured if he broke them all off,no one would notice........yeah ,right........they noticed.
Stainless on stainless is a dangerous mix. Most times small bolts with light torque applied you are OK.
Any high torque applications and you need a minimum of a good oil or grease lube, preferably an anti seize
Have seen some very expensive repairs from screwing together parts with no lube.
When I started putting stainless pipe down bores with real corrosive water it was suggested I use a different grade stainless coupling to the pipe found it was better to use brass couplings stainless on stainless was a mongrel to seal being so hard the threads won’t bed into one another
The first one I did was stainless couplings and the pipes would seep at the joins when the wind stopped water level at sixty metres took a while when the wind started to fill the pipes so pulled it up and Stagged couplings both ends fixed it don’t know how they will undo next time
Don’t have to worry about it I always said climbing windmills was keeping me fit but then it got to the stage it was hurting too much so I’ve gone back farming full time no money but less aches in the legs
Ended up using brass couplings with graphite grease I always had it used it all the time on gal pipe two wacks with the hammer didn’t matter how long it had been there and they’d undo
The following user(s) said Thank You: Medicated Mick