Tutorial - Modeling square cut nut in SolidWorks?

Here is the tutorial. Part-2
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Step 1:
Continuing with previous tutorial we have the same part.
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Step 2:
Reference Geometry >> Plane.
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Step 3:
Offset Top plane by any distance inside the part.
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Step 4:
Plane1>>Sketch.
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Step 5:
Select the sketch2 under boss-extrude2 and then convert entities.
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Step 6:
Extrudeed boss.
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Step 7:
10mm distance. Uncheck Merge result.
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Step 8:
Insert>>features>>move/copy.
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Step 9:
Select bolt body and then check copy. Click OK.
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Step 10:
Insert>>features>>combine.
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Step 11:
Operation type=Subtract. Main body is nut and the bodies to combine is bolt.
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Step 12:
Now move the nut and we have the thread cutted inside the nut and they are perfect since they are cutted exactly through bolt.