Dave Plowman (News) wrote:

In article
,
D.M. Procida wrote:
I'm cleaning up a coffee machine. Two of the four 5mm allen bolts on the
boiler are well and truly stuck. In fact I've damaged the heads now.

What next? Cut a slot, and use a large flat-bladed screwdriver?

Drill them out. Easy with allen heads as you already have a centre. If an
allen key won't budge them, I doubt cutting a slot will either.

If I do drill them out, what next? Do I need to recut the thread in the
hole, to the next size up?

Daniele