SCT male thread size

Does anyone know the thread directly on the back of an LX200 10" SCT? I am not referring to the 2" thread, but the male thread right on the back of the ota before the 2" adapter.

Thanks,
Brian

Brian --

Meade 10" - 14": 3.25"-16tpi.

While I'm here:
... Meade 16": 4"-16tpi
... C11 & C14: 3.29"-16tpi

-- Jeff.