M22 Contact Blocks M22 series of contact blocks. Suitable for use with M22 series modular push buttons and switches. Features & Benefits Front fixing Quick installation Heavy-duty construction Notched hole mounting with anti-rotation tab IP20 rating Approvals UL, CSA. Standards IEC/EN60947. Approvals UL; CSA; IEC/EN60947 Eaton RMQ Titan 22mm Range