 Click on  and Project
Open EngineeringNut and BoltBolt
Add the bolt_thread
 Add the child model bolt_thread
Copy and move  the bolt_thread up  12
Copy the bolt_thread
Copy and move the bolt_thread up 12
another 4 times
Add the bolt_bottom
Move the 3D Cursor  down under the threads
Add the child model bolt_bottom
Move the bolt_bottom
Move the bolt_bottom up into position
Add the bolt_top
Move the 3D Cursor up above the threads
Add the child model bolt_top
Move the bolt_top into position
Press Save to save the model
(click here to go back)
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