Using the Polar Array tool, you can make an Array along a circular path. To explain the Polar Array tool, I will use this drawing:

In this case, we need to make five copies of the hex bolt along the circular path, shown by the dashed circle in the previous figure. For this, you need to start with the Polar Array tool, as instructed here:

1. Select the Polar Array tool from the Array flyout in the Modify panel of the Home tab.
2. Select the hex bolt from the drawing area and press the Enter key.
3. Now, the command line will prompt you to specify the center of the Array; in this case, the center of the Array is the center of the dashed circle. Click on the center of the dashed circle to specify the center of the Array.

4. Now, you can change the Array parameters using the blue grips on the Array or you can change it from the Array Creation tab as well. Click the blue arrow grip that shows up on the circular Array and move it along the circular path. You will notice that two grips will now show up, as shown:

5. If you click the arrow type grip close to the first hex bolt on the top of the circle, it will let you change the gap between the Array objects. The last arrow grip will change the overall distance that the Array is applied to along the dashed circle.

You can also change distances and the number of objects in the Array, along with other parameters, from the Array Creation tab, which we will do next:

1. The first panel in the Array Creation tab is Items, where you can type in the number of objects that you want in the Array. Type in the total number of Array copies you want in the Items field. The default value in this field is 6, but I will change it to 5 for this example.
2. The next field, Between, is the angle between objects in the Polar Array. The Fill angle is the total angle along which the Array is applied. I will change the Fill value to 360 degrees and the Between angle will change automatically to 72, which is the angle between corresponding objects in the Array:

3. The next panel is for rows but adding rows here won't be practical as we only want a single row; but to show you the effect of the Rows field, I will type 3 in the Rows field and set the distance between rows to 50. The resulting Array will look like this:

4. As you can see in this case, the Array contains three rows of hex bolts with a gap of 50 units between the rows. So, once again, I will change the number of rows back to 1 and now the Array will look normal again.
5. The next panel, Levels, will add Array objects along the Z axis and as we are working on the X and Y axes only, changing its parameters won't make any visible difference to our drawing.
6. In the Properties panel, you will once again notice the Associative option, which lets you make Arrays that can be edited later. In the Properties panel, there is also a new option, Rotate Items, which we will discuss here.
7. When you uncheck this option, the Arrayed copies don't rotate, but when you keep this option checked, the Arrayed items rotate along the circular path, as shown:

8. You will notice—in the first Array in the previous figure—that the hex bolt is rotating with respect to the dashed circle but in the second Array, the hex bolt is always in an upright position or it won't rotate at all. It also takes the same orientation as the original object in all of its Array copies.
9. Once again, when you have finished making the Array, click on the Close Array green checkmark and the Array will be made along the dashed circular path.

This was the Polar Array and, as the preceding examples show, it is great for situations where you want to make multiple copies of an object, such as a blot or nut along a circular plate. The next Array tool is the Path Array, which allows us to make Array copies along any selected path.