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Shimano bleed screw problem

fuzzdogfuzzdog Posts: 196
To cut a long story short I (like many) rounded off the bleed screw on my 105 r7020 sti lever.
I tried to drill it out. Which I did but the heat build up damaged the thread of the female part on the shifter. All I can really do now is try and re-thread it. What I need to know is what tap tool to use. What size thread etc?
The replacement screw part is Y0F398030. which should be the same thread size as the bleed cup adapter.
Any ideas?


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