3SU1000-1HB50-0AA0-Z Y13 SIEMENS3SU10001HB500AA0ZY13

Mushroom pushbutton, 22 mm, round, plastic, blue, 40 mm, positive latching, acc. to EN ISO 13850, rotate-to-unlatch, with laser labeling, symbol number according to ISO 7000 or IEC 60417