On the mounting spire there may be slots from the clamp of the machine that do not affect the overall diameter of the fastening!
If you did not find the finish you need on my page, write to me and I could make a lot for you according to your drawing.
You get exactly those product that are in the photo. Look carefully at the photo. If the product has technological holes or flaws, you will learn about it from the description. Product will be packed in a light and strong foam box. You will save on delivery, buying a few lots. I combine shipping. If you have questions, ask. I will gladly answer!