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

The larger picture appear to show that there is some of the cross head left.
I have a cross head screwdriver where the point of the cross head has
been filed off so it doesn't bottom in the screw head when attempting
just to catch on the edges where remnants of the cross head may give the
screwdriver some grip.

If drilling - use a drill with a larger diameter than the head of the
screw and JUST drill the head off - leave the rest of the screw intact.
You should than be able to remove the tap head and have the rest of the
screw standing proud of what it is screwed into with easy access to use
mole grips to get it out.

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