I had two speaker stands sitting around that are meant for tiny surround sound speakers with threads in them, but I needed to raise my bookshelf speakers in my room. I removed the L bracket that allows that, and had to create a surface for the speakers to rest on. So I found two hardcover books, punctured the center of the rear cover, and inserted a screw with large fender washers surrounding the cover on each side. Then screwed it into the stand
If you don't want to sacrifice any books, remember, there are various other DIY methods for creating speaker stands: Dirt-Cheap Speaker Stands using the base of those horrible halogen lamps from college, articulating lamp arms for smaller speakers, or a more elegant IKEA hack solution.