I was so glad to find this here on Revain. I was a little nervous as some reviews say the part sticks out so much. While waiting for my part, I went to my vacuum cleaner and looked at my part. I found that my part was not only worn out, it was actually broken. The broken piece was in the end of the brush. I believe this may be the cause of some people's problems. You need to make sure there is room around this screw at the end of the brush. If not, it's probably because the end cap broke off and is stuck there. Answer this if you have any questions and also let me know if it helped you. I came back to check this out to let people know about this issue. :)