I’m installing a ceiling fan & have got this screw to attach the bracket to the ceiling. The screw is a little too long can I cut it down but then the point at the end will also be cut off does that matter? I did look at just getting some new screws but can only find ones that are threaded all the way & I also have some washers that I have to put on. It just says this screw is ø5 x 50mm?