topic Re: Looking for help making a hole for a hex nut in Fusion Support Forum

Looking for help making a hole for a hex nut

a_haraldson — Wed, 18 Feb 2026 22:59:29 GMT

I'm new to Fusion. I have a mounting bracket design with a solid bottom face, to be 3D printed, but I need space for a hex nut to fit in under the existing mounting points. Attached is an angled view of the top of the bracket, the bottom face is flat.

The cylinders' max diameter is the right size to fit the nut. How do I position a hexagonal hole of a certain diameter directly under the mounting holes on the top of the piece?

Re: Looking for help making a hole for a hex nut

TheCADWhisperer — Thu, 19 Feb 2026 01:32:19 GMT

@a_haraldson

Can you File>Export your *.f3d file to your local drive and then Attach it here to a Reply?

Re: Looking for help making a hole for a hex nut

a_haraldson — Thu, 19 Feb 2026 18:23:42 GMT

Thanks for the reply, here's the .f3d

Re: Looking for help making a hole for a hex nut

TheCADWhisperer — Thu, 19 Feb 2026 20:22:45 GMT

@a_haraldson wrote:
Thanks for the reply, here's the .f3d

@a_haraldson

How did you attempt to attach the file?

You cannot use email reply to attach files - you must use the web forum.

You should verify that it is actually attached after replying.

Re: Looking for help making a hole for a hex nut

a_haraldson — Thu, 19 Feb 2026 20:32:27 GMT

I'm using drag and drop/browse to attach, trying again

edit: that seems to have worked this time. my mistake!

Re: Looking for help making a hole for a hex nut

TheCADWhisperer — Thu, 19 Feb 2026 21:16:41 GMT

@a_haraldson

What is the source of the original geometry?

You should observe that there is no solid body in the file - only mesh body.

The mesh body should be converted to a solid body.

You should observe that there are no cylindrical features on the mesh body - only coarsely faceted triangular planar surfaces that sort of look like a cylinder.

Do you have the original file before it was converted to a stl mesh geometry?

Sketch a polygon and dimension so that it is clear what you want...

Are you sure your Units are correct?

I suspect this is 10x larger than what you intended.