I have a set of 4 Lumen R2 lights. I opened the 2nd light in the daisy chain twice to be able to use 2 lights only and then back to 4 lights. When reassembling for the 2nd time, one of the screw on the clear cap snapped. I was using a screw driver but only finger tight. I have to admit however that at some previous point, the ROV was left not-rinsed during 4 days after a dive in salt water and some corrosion occurred in a few places.
Anyway, looking closely at the snapped screw (and the other screws two), it seems as if the end of the threaded part connected to the screw head is somewhat hollow. This means that the threaded part and head are connected by very thin metal. See sketch below for illustration.
Is this a know problem or just an isolated issue combined with corrosion?
I temporarily solve the issue by taking a spare Bluerobotics screw (dome mount I think) and cutting excess length. See photo below.
Can you confirm that the silver screws are stainless steel whereas the black ones are anodized aluminum?
Can I leave it like this or should I source a new aluminum screw?
From now on, I will just hold the hex tip (without screw driver) in my hand to screw the aluminum screws to make sure over-tightening is avoided.