I bought one of these a few months ago for a Skywatcher 5" MAK to attach a Bintel 2" SCT focuser.
Will grab a picture for you. Thread sizes where greater - but the Bintel focuser wasn't threaded all the way to the bottom - and the adapter wasn't long - so when I tightened it it fell off the focuser. To make it work I needed to add a 3 mm spacer so the SCT adapter was still on the thread.
Also I had to take the rubber handle off the MAK focsuer to give it enough space for the SCT focuser to fit - but after that - all great!
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