SW53AA2 is a black slip-on button cap designed for the SA1 series ultra-miniature pushbutton switches. This optional accessory has a diameter of 0.250 inches (6.35 mm) and is intended to provide a protective and aesthetic covering for the switch plunger. The cap is constructed with materials compatible with the SA1 series switches, which feature gold-plated copper contacts and terminals. This button cap is commonly used in applications requiring customized switch appearance or additional plunger protection in electronic control panels and instrumentation systems.