Well I hear ya' bly....
I have always used nothing but the best around in hardware
and materials, when doing a boat.. (not just SeaCrafts)
I had a 308 stainless clamp that the worm screw just fell out!
It had not been over tightened if that is what you are guessing..
Luckily it was on an exposed fuel line on a 15 Whaler I had previously
owned! A friend in the marine business recommended double clamps,
keep in mind this was over 30 years ago with that tip.
I have adhered to that standard ever since..
Everyone has their way, this is just mine!