Tutorial - Modeling a CAP Nut in SolidWorks?

Here is the tutorial.
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Step 1:
Top plane>>Sketch.
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Step 2:
Draw a polygon with 25mm side.
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Step 3:
Extrude it by 20mm.
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Step 4:
Right plane>>Sketch.
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Step 5:
Draw this profile.
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Step 6:
Trim it.
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Step 7:
Close it.
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Step 8:
Now revolve it.
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Step 9:
Section view.
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Step 10:
Bottom face>>Sketch.
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Step 11:
Convert the circular edge.
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Step 12:
Extrude cut it.
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Step 13:
Polygon face>>Sketch.
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Step 14:
Draw a circle tangent to the polygon edge.
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Step 15:
Extrude cut it at 45º draft with flip side to cut checked.
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Step 16:
We have the part.