thanks for the cleaner view..
and frankly.. I am even more convinved than befor that there is something ON the thread
rather than there is some thread gone...
The measurement I asked about could now essentially solidify my assumption
(well ... or falsify my claim of course
)
w/o the measurement
try heating it up with a pocket torch maybe soak it in PB Blaster
or other good quality penetrating oil (wd40 only super penetrant; not the original formula!!),
then hit it counterclockwise with a punch,
or use a hacksaw (hand held.. no power tool!)
- again so that the teeth will pull counterclockwise in case it grabs-
I think what happened is that some PO used some wire or thinwall tube to beef up the original thread..
since he wanted to use some next size up imperial nut instead of the metric one that belongs on there...
which of course led to a failure. (3/8" instead of M8 for example)
Tough, but that top edge does not lok like a stripped thread folding in on itself to me..
and the gaps are essentially marking where the washers ought to be (and washers do not strip threads
)
if you got a measurement and are convinced it's certainly nothing but a stripped thread,
try recutting it to it's original size wit a high quality threading die
(IIRC it's an M8 1.25 ) first, that way you can tell how much material has been lost and judge if it's better to step up or down from there.
'sid