What Size Screw Holds the Up and Down Shifting Levers on Ultegra Shifter? There's a screw on the back of my Ultegra (circa 2000) shifters that holds the down shifting (on the right side) inner lever, to the up shifting outer/longer lever. I've long struggled with it loosening, but last week it fell out during a bumpy ride.

I'm having trouble describing it, let alone finding a replacement screw. What size is that screw and what should I call it?
Surest way: Measure the screw on the other shifter and get a replacement at any place which sells screws. Use screw glue if you already know the screw comes loose easily.