If it were me I'd create a new custom thread file for non-standard ACME. I've just done a quick search and found a calculator here which should help you get the correct figures. Information on creating custom thread files can be found here.
Hope this helps.
If this answers your question please mark the thread as solved as it can help others find solutions in the future.
Marcus Wakefield
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I've created a Windows application (and now Mac as well) for creating custom thread files for Fusion. You can find out about it here. Hope you find it useful.
If you need to know how to offset threads for 3D printing then I've created a guide here which you might find useful.
If you would like to send me a tip for any help I've provided or for any of my software applications you've found useful, you can do this via my Ko-Fi page here.
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