Tutorial on Modeling Bolt in SolidEdge ST4?

Tutorial.
Step 1:
Start SolidEdge.
Step 2:
Circle tool and then select origin.
Step 3:
Make a circle of 20mm diameter on top plane by locking it clicking on the lock icon.
Step 4:
Select Extrude.
Step 5:
Select the circle and then right click.
Step 6:
Extrude by 100.
Step 7:
Polygon tool.
Step 8:
Top face and then select the center of the edge.
Step 9:
Distance be 16.5mm and angle 0.
Step 10:
Select the region of the polygon.
Step 11:
While pressing the control key on the keyboard select the region on the circular face also.
Step 12:
Extrude it by 12.5mm.
Step 13:
Select chamfer equal setbacks.
Step 14:
Lower edge and input value 5.
Step 15:
Front view (Control key + F).
Step 16:
Draw a line along Z-axis of 85mm with endpoint at origin.
Step 17:
Polygon by Center.
Step 18:
Click the intersection of these two edges.
Step 19:
Input Distance 1mm.
Step 20:
Select helix under cut features.
Step 21:
Select the line.
Step 22:
Select the polygon.
Step 23:
Click Tick mark button.
Step 24:
Input turns 22.5mm. Right click to accept it.
Step 25:
Now go to the end face of the thread. Select the face and then project the edges.
Step 26:
Extrude it by remove at ~10mm.
Step 27:
Our bolt is ready.