Rancilio Black Push Button with Green Light resources/yama-glass-cold-brew some are also secured with

some are also secured with a nut and washer rather than a simple thread

spring and spout to complete the assembly

a mismatched shaft is the most common fitment issue with rotary main switches like this one

know up front that you won't be able to source a matching replacement insert for this new knob

Rancilio Black Push Button with Green Light resources/yama-glass-cold-brew some are also secured withOEM Rancilio Push Button Switch Green Light Genuine Rancilio black push button switch with a green indicator light, sized for the standard 22 x 30 mm panel cutout used across the Classe and Epoca lineups. It's the direct factory replacement for a worn, sticky, or non illuminating switch. COMPATIBILITY Fits: Rancilio Classe 6, Classe 7, Classe 9, Classe 10, and Epoca 1 Group models (multiple sub variants including E, S, USB, LEVA, and SDE panels)