Tutorial - Modeling CSK head sq. nut coach bolt in SolidWorks?

Here is the tutorial.
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Step 1:
Start SolidWorks in Part mode. Top plane>>Sketch.
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Step 2:
Draw a circle of 24mm dia.
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Step 3:
Extrude it by 2mm.
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Step 4:
Top face>>Sketch.
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Step 5:
Select the edge and then convert entities.
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Step 6:
Extrude it by 6mm and 60º draft.
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Step 7:
Reference Geometry>>Plane.
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Step 8:
Select the circular edge. Click OK.
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Step 9:
Plane1>>Sketch.
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Step 10:
Draw a Polygon.
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Step 11:
Extrude it by 10mm.
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Step 12:
Top face>>Sketch.
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Step 13:
Draw a circle tangent to the sides of the polygon.
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Step 14:
Extrude cut with draft at 60º.
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Step 15:
Top face>>Sketch.
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Step 16:
Draw a circle tangent to the sides of the polygon.
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Step 17:
Extrude it by 50mm.
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Step 18:
And we have the part.
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Step 19:
After making the threads.