What size thread is this?

I don't think 28 mm; that's more than an inch (1 inch = 25.4 mm).

Thats because I was looking at the 64ths scale on my measuring tape .....
which means its 28/64" ... i think.... but thats just starting to sound rediculous now :) reduction is needed, but math was never my strong point.

I will take it to the hardware store, If I ever end up there.

I dont often make many trips there anymore, nor do I have the time, which is why I was hoping somewhere online might be able to identify it (and yes I know how hard that is lol)

Im almost starting to think its a custom sized thread.
 
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