Pete.
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- 14,152
- Location
- Kent, UK
M36 x 8tpi never simple is it.
Looks like it. The OD doesn't actually matter that much so long as it matches the backplate, and the TPI is the same.
If it was 3mm pitch the threads would line up with the red lines below.8tpi is 3.175mm so it looks like that is what you have.