Watch case threads

[jude_a_williams4]

Trying to add counter threads to the bottom .7mm of a watch case so that the back of the case can screw on. Having difficulties (highlighted in blue is where i would like the counter threads to be). do not have dimensions for the thread on the case back that will be a separate piece.

[kacper.suchomski]

Hi

What exactly is the problem?

Do you need a special thread?

[jude_a_williams4]

I guess a special thread is necessary? ive tried quite a few of the thread types and I haven't found one with small enough threads yet, also the diameter changes in almost all of them, but that isn't as big of a deal. 

[kacper.suchomski · Accepted solution]

What kind of help do you expect then?

[TheCADWhisperer]

@jude_a_williams4 

You need the exact specifications for the threads (this information should be available somewhere on the internet).

You will have to use that information to create a special thread. (Someone here can help you do that portion once the specification is known.)

But first thing I notice is your Case Top sketch is not fully defined and far more complex than it need be (only need 1/4 of the sketch).