My apologies for starting a thread so 'trivial', but I could not find another thread that is appropriate.
My old Epson 9500UB projector is ceiling mounted using the included mount ELPHB800, and I realized that I have lost the included Allen wrench. It is non-standard (it has a round hole in the middle, instead of being solid). Can this be purchased, or is there something equivalent that I can purchase?
You can always try to vise grip off the old allen bolts and replace them with the same thread size and pitch. It's likely metric, but every once in a while you get surprised with imperial hardware these days.