TE Connectivity's Anti-Vandal Pushbutton Switch Hardware consists of nickel-plated brass hex nuts and silicone O-rings. The hardware comes in 16mm, 19mm, 22mm, and 25mm sizes. These components are for use with the Alcoswitch Anti-Vandal Pushbutton Switches in the AV, AVH, AVC, and AVP series'. https://elecena.pl/product/17765334/switch-hardware-16mm-nut 2021-04-17 https://elecena.pl/product/17765334/switch-hardware-16mm-nut 2022-03-29 https://elecena.pl/product/17765334/switch-hardware-16mm-nut 2022-06-23 https://elecena.pl/product/17765334/switch-hardware-16mm-nut 2022-06-25