On 10/05/2021 15:40, GB wrote:
On 10/05/2021 15:38, Clive Arthur wrote:
On 10/05/2021 15:02, RJH wrote:
5 of 8 allen bolts fixing 2 metal sheets on my car have stripped the
hex key.
They are/were 4mm, and I think stainless steel. I've tried drilling
one out to
5 and 5.5, but the spirally tool in this pic:

https://www.icloud.com/sharedalbum/#B0zGFssfGG2m5Jn

can't generate enough purchase. It grips a little, but slips. I don't
know
what that other bit is in the photo - memory suggests it's a screw
extraction
tool I got from Aldi. There isn't enough head on the bolt to use mole
grips.

I'm not sure if I'm using the extractor incorrectly, or it's just not
very
effective. Thinking now about cutting a slot in the head and trying a
flat
blade screwdriver. I don't think they're outrageously tight. I can
access the
other side - but I don't want to damage the thread in the sheet the bolt
screws into.

Suggestions appreciated.


If there's room, put a nut on the back, and use mole grips on the
thread.Â* Once loose, grind the thread down to the nut and remove the nut.


If there's lots of room, put two nuts on the back and lock them
together. Then turn that lot.


Good idea.

--
Cheers
Clive