Re: Brembo Caliper Stripped Connector Hose Thread
Hi. I wouldn't normally answer this because I'm not certain that I am correct (and it really annoys me when people just "guess" at technical answers and have not posted from personal experience, so please disregard this post if you think it may be in the same category). FWIW, what follows is based on my experience on other cars over the years.
Anyway, here goes:
You may not have a problem here. Hydraulic unions are not always threaded right up to the edge of the hole, but are bored out for a clearance on the thread for a little way - maybe 5mm or so if my memory serves me correctly. I think this is because it helps to align the hose fitting in the hole before the rather vulnerable fine thread is engaged.
If it is not too much of a pain in the backside, I'd have a careful look into the hole again to try to determine if the thread has actually stripped or if it was never there (although the top of the hole could look like it might have been threaded if the hose fitting had left its own marks on the inside as it was screwed in previously. You should also assess how much thread is actually present - it doesn't take much force (or thread) to properly nip up a union if there's a taper seal as I'm sure you know.
OTOH this is the brakes... Don't know if thread inserts are available but if the uion relies on a taper seal at the bottom, I have my doubts whether an insert will do the job. Others will have better info, no doubt.