The screws are not fitted with any thread locker, but they are done tightly so that they do not come loose.
There are two types of cross-head screws – try a “Posi-Drive” screwdriver, rather than a “Philips”.
Thanks Nick, for approving the post and confirming the need for a different, more “grippy” screwdriver choice than a straight #1 Phillips. I really could not believe that any of the aforementioned possibilities that were running through my stroke recovered brain were reality, but I did briefly eyeball my MIG welder. A Posi-Driver it is.