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None are threaded Fahim - but the adapters are either threaded onto the push-in rings, or made as-is without the thread.
The fit is SO tight that air pressure must be removed in pushing them in!!! I always take off the dust caps, otherwise they blow-off when inserting the snoot etc.
So, what I mean is the adaptation onto the focuser tail is PUSH fit. If it is made as a complete unit, then fine, but if you want other adapters, it is better to thread another adapter to the push-fit plate.
I posted more pics on CN.
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