12mm Self-Locking Round Push Button Switch, 2-Pin

Unlike a momentary button that only stays active while physically held down, this 12mm push button latches into its pressed state on the first push and stays there until pressed a second time to release - genuinely useful for an on/off style control where a user shouldn't need to hold a button continuously to keep something active.

The round plastic body and 12mm panel-mount size matches a widely-used push button footprint, making it a straightforward drop-in choice for project enclosures already designed around that common button size. Electrical connection is a simple 2-pin interface, wiring directly into a basic switched circuit without needing any additional driver or debounce circuitry for simple on/off applications.

Self-locking (latching) mechanical switches like this one are a genuinely different interaction style from momentary tactile buttons - they're the right choice when a project needs a button that stays latched down to maintain a state (power on, mode engaged) rather than one that should spring back the instant it's released. Good electrical conductivity through the switch contacts keeps the connection reliable across repeated press-and-release cycles.

Makers and hobbyists building a simple DIY project control panel, a power on/off button for an enclosure, or any application needing a latching push-to-toggle control rather than a momentary tactile button will find this 12mm self-locking switch a practical, inexpensive choice for that interaction style.