Small slotted screw used to secure the stop plate to the rotor valve housing on Bach 36, 42, 45 and 50 series Stradivarius tenor and bass trombones. The stop plate is the part that holds the two rubber bumpers. Also fits Bach TB200B trombones. Sold individually - order 2 if you wish to replace both screws.
• Slotted screw cap • 6.8mm (0.27-inch) overall length • 2.6 mm diameter thread • 4.75mm diameter cap