I need to undo 4 x CSK stainless steel screws 3/8x24 UNF These are screwed into 7000 series anodized billet aluminium.
Fixed by a Loctite (or similar) thread lock
The heads are imperial allen socket.
From past experience I know that even non-Loctite ones can be difficult to remove, the screws being stainless are relatively soft and they will round out easily.
Any thoughts over best approach .... I could leave a soak in Plus-gas penetrating oil, but unsure if that will help .... or I could apply heat.
If the latter then how much to help break Loctite, without damaging anodized finish or softening screw. .... I have a micro propane torch so could apply localised heat ...
I also have a pneumatic impact wrench .. I could also use that rather than just allen socket in ratchet handle