The ZB4BA2 is a head for a non-illuminated pushbutton, designed for a standard 22.5 mm panel cutout. It features a chromium-plated metal bezel and a round, black, unmarked flush operator with a spring-return mechanism. This component is built for high durability with a mechanical life of 10,000,000 cycles and can operate in temperatures ranging from -40 to 70 °C. Its robust construction provides high protection ratings, including IP66, IP67, IP69, and IP69K, as well as NEMA 4X and NEMA 13. This makes the ZB4BA2 head suitable for use in demanding industrial environments requiring reliable momentary switching operations.