7 mm thin-wall tube spanner or hex socket

[rob love]

If the depth is what you are showing in your photo of the regulator, run a dremel cutting disc over each screw putting a slot on them and remove them with a screwdriver. Don't be afraid to go into the old regulator if need be.


Grinding down your cheapest 7mm socket to a tapered point would not be hard to do either. I would use an angle grinder myself with a sanding disc after fixing the socket on an extension and running it in the drill press.