Tutorial - Modeling Rounded counter sunk bolt in SolidWorks?

Here is the tutorial.
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Step 1:
Top plane>>sketch.
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Step 2:
Draw a circle of 15mm dia.
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Step 3:
Extrude it by .625mm.
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Step 4:
Dome feature.
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Step 5:
Select Top face and input the length be 1.5mm.
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Step 6:
Bottom face>>sketch.
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Step 7:
While selecting the bottom face click convert entities.
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Step 8:
Extrude it by 3mm and 45º draft.
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Step 9:
Bottom face>>Sketch.
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Step 10:
Click Convert entities.
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Step 11:
Extrude it by 30mm.
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Step 12:
Chamfer.
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Step 13:
Lower edge at 1mm and 45º.
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Step 14:
Front plane>>Sketch.
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Step 15:
Draw this rectangle.
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Step 16:
Extrude cut through all in both direction.
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Step 17:
Now we have the part body.
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Step 18:
After cutting threads.