Blue 16 mm momentary push button switch with twopin terminals, model R16503. This nonilluminated switch is designed for panel mounting and provides momentary contact action. It is supplied as a single piece. Key benefits Precise momentary control: the circuit closes only while the button is pressed, making it suitable for input triggers, resets, or start/stop commands. Clear visibility: the blue actuator offers easy visual identification in a control panel. No lighting required: no builtin LEDs, eliminating power draw and potential LED failures. Simple wiring: twopin connection allows straightforward installation in low complexity circuits. Compact footprint: 16 mm front panel size fits in space constrained panels and enclosures. Key attributes Functionality: momentary push button switch Lighting: no lighting (nonilluminated) Terminals: 2pin Color: blue Size: 16 mm Model: R16503 Quantity: 1 piece Mounting: panel mounting for use in standard 16 mm cutouts Material: not specified in the available information Specifications at a glance Model: R16503 Front diameter: 16 mm (panel cutout compatible) Color: Blue Action: Momentary Lighting: No lighting Terminals: 2pin Quantity: 1 piece Compatibility and installation notes Designed for panel mounting in standard 16 mm holes Twopin wiring simplifies installation in a wide range of electronic projects and control panels Compatibility with typical low to moderate current circuits is implied by common use, though no electrical ratings are provided here Ensure the panel opening and mounting hardware match a 16 mm diameter switch for a secure fit Applications Electronic prototypes and microcontroller projects: use as a user input that is active only while pressed (for example, reset, start, or function trigger) Control panels for equipment and machinery: implement momentary control for start/stop or testing actions Hobby electronics and arcade or DIY projects: integrate as a clear, blue momentary switch in a 16 mm panel interface Usage tips Verify panel cutout tolerances and mounting depth before installation Route wiring to minimize stress on the twopin terminals Since there is no illumination, plan the control panel layout to rely on status indicators or other cues to convey on/off state This description preserves the model, features, and specifications indicated by the product title while presenting clear, customerfriendly information aimed at aiding informed decisions.