On 02/12/2019 20:54, ss wrote:
Any ideas?
Not my doing but one of the screws in tap is seized and head destroyed.
(see image)
I have carefully tried various cross head bits and needle nose pliers.
I have currently sprayed with lub to soak overnight.
Access is not good as it is recessed by 12mm and the dimaeter of the
access point is 12mm.

My next attempt would be to drill out but want to leave that as a last
option.Â* So any other ideas to explore first?

https://imgur.com/ZAjiiIG

Made harder by being sunken in the shroud... You might be able to create
a couple of flats on either side with a needle file, then get pliers on
it. You could also try some thermal shock - hold a bolt with pliers, and
heat the end blow torch and then push it onto the end of the screw for a
bit before trying to turn it.

Personally I would probably try an anticlockwise drill bit just slightly
larger than the size of hole already in it. It will either grab and spin
it out, and if not, it will take the head off, meaning you can remove
the tap handle and then worry about the shank of the screw after.

--
Cheers,

John.

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