Solidworks 3d printed threads

I want to create some 3d printed parts that thread together. II thought I could use the thread tool. I modeled a hole and a cylinder both 1.5" in diameter and then used the thread tool. I put some larger threads on there so they would print better 2"x4.5. They print and look good but solidworks just removes the material so they are super loose.

It seems at though I would need to size the cylinder larger so when solidworks cuts the threads the fit is correct. However determining what that size should be hasn’t been easy. I can’t measure the diameter of the major diameter in solidworks directly so I drew a circle with the cylinder in wireframe view to try and approximate the major diameter should be.

Am I going about this the right way or is there a better way?

I am not sure I fully understand the issue. But I think you need to use “extrude thread” on the cylinder and then use “cut thread” in the hole.

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Thank you! That is what my issue was. They match up now!

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