Tutorial how to make nuts

1. Step 1

   open a sketch to front plane draw a circle and a hexagon then extrude it
   
   

2. Step 2

   open a ketch on the body and draw a small and bigger circle.
   
   

3. Step 3

   use cut extrude command and select the area between circles
   
   

4. Step 4

   click on draft and enter draft angle 60
   
   

5. Step 5

   mirror the cut extrude
   
   

6. Step 6

   open a sketch to front plane and draw a sketch like this. it will be tooth profile
   
   

7. Step 7

   now we will add helis. open a sketch top of body and draw a circle
   
   

8. Step 8

   use insert>>curve>>helis command and select circle and enter values
   
   

9. Step 9

   use cut swept command. select the tooth profile and select the helis
   
   

10. Step 10

    open a sketch to front plane and draw a thing like this. then use revolved boss command
    
    

11. Step 11

    your perfect nut is ready. Enjoy:))