How to create a nut with curvature on the top or bottom

You can easily use the feature of body to create the nut with the fillet as the above figure

  1. Step 1:

    First of all create a hexagon and a circle in the sketch on XY plane & Pad it to look like this.

  2. Step 2:

    After that go to INSERT -> BODY.

  3. Step 3:

    Now sketch a circumscribed circle for the hexagon on the XY Plane

  4. Step 4:

    Pad the circle to become a cylinder for the same pad length as the hexagon

  5. Step 5:

    Now create a fillet on the cylinder for the required dimension like below.

  6. Step 6:

    Go to INSERT -> BOOLEAN OPERATORS -> INTERSECT as shown in figure

  7. Step 7:

    Select the cylinder first, then after select the paded hexagon, & then click ok to look like this.

  8. Step 8:

    Your required Hexagon nut looks like this. See here.