I always put thread lock on every metal to metal fastener... to avoid stripping any of my screw heads, I always hit every screw with 5 seconds of flame to melt the thread lock and effortlessly remove screws. This is an essential tool that I use every time I wrench on my cars.
I have been using this self igniting pencil one for over a decade, very compact and fits in my pit box where I use it for every single rebuild, also on the same 10oz can of butane for a decade too, ha!
https://www.amazon.com/Refillable-Butane-Soldering-Jewelry-Pinpoint/dp/B0733SWJQL