Thanks evryone for your help, propably give up this projekt, i use idea Mr.K.

no one can this do?

Ok I try with convexhull and still not working

modelhead if you not see in first post I apologize for my english becouse not good

Who is convexhull?

Sorry i dont see your project, I not want animation, I want physics srew up, I mean nut rotate and srew screwed into, I hope that you understood me

Thanks for you interest
Ok maybe this project, this screw is short, but srew not srewed up, if you know how make good, pls upload corrected project, becouse I have already treated.

ASDSADSAD.skp

First i want apologize for language, I hope that you will understand me
I have a problem why is not work, the screws in the nut in sketchuphysics

screw.skp