Thread on Threads

[Michael Clark]

:help:

Hi all,
Can anyone please confirm for me specs on T and C threads. ie diameter, pitch and angle. Are the following correct?

T-thread, 42mm dia, pitch 0.75mm (don't know angle) metric thread.
C-thread, 1 inch dia, 32 TPI (dont know angle) imperial thread.
Need to machine up some adaptors but don't know the specs.

Cheers
Michael