Thank you for your comments.
I have a couple more questions if I may ask please.
How do I turn on hidden geometry?
Where is the option for the poly circle count?
I do have the free version of SketchUp. I have looked and I cannot find these options.
Thank you.

Thank you again for the reply.
I have so far done the following to try and fix this problem.

1. Drew up another 4-40 screw and inserted it into the model.
2. Had a friend draw up the screw in SW and send it to me.
3. In SU. I have gone to Window/Soften Edges and tried different settings.
   Nothing has worked so far.
   I am trying to render this in Kerkythea, but this has stopped me cold.
   The 4-40 button head screw is .214 in diameter, so I tried a smaller screw and it shows up correctly. So far, everything is showing up correctly but these 4-40 screws. I am totally lost as what to do at this point. I have probably spent at least 8 hours on this one problem. (trying different settings and looking up any possible answers on the internet)
   The model by itself has 15 sides (head diameter) when I insert it into SU by itself.
   I have included the model.
   Could someone please look at this?
   Any suggestions would greatly be appreciated.
   Thank You

4-40 x .625 BH BLANK.skp

Thanks for the quick reply.
Sorry for the quality. Its late and I don’t know how to use the program efficiently.
Again, only the screws are like this. The rest of the model has the correct radius on the correct parts.
Thank you.

Hello,
I am just starting with SketchUp and I have a basic (I hope) question.
I have an assembly of a small engine that was made in Alibre. When I export it to Sketch Up, some of the engine screws are round, while others are hexagon.
The screws are 4-40 button head which should be round.
While in SketchUp, is there a way to modify this?
Thank you in advance.