Tub Spout Diverter Set-Screw Pull Knob
A replacement pull-up knob for a tub spout diverter whose original knob snapped off or stripped. It has a 32 mm finger-grip cap and a 6.3 mm stem socket, 17 mm deep, clamped by an M3 set screw through a captured M3 nut. Because the set screw grips rather than a thread, it fits any round or stripped lift rod from about 3.5 to 6 mm, so you don't have to replace the whole spout. Print it in PETG or ASA because it sits near hot water.
bathroom tub-spout diverter replacement-knob