Audible alarms are used on many machines and panels. Many have the retaining nut on the face of the panel. The retaining nuts can be loosened and removed by operators, and the buzzers can fall into the panel.Auer Buzzers mount in standard 22 mm holes, and are mounted from the front of the panel, with the retaining nut and optional anti-rotational washers mounted from the rear. This makes them tamper resistant. Additionally, many of these buzzers have a removable terminal ...