815/817 Ultra Low Profile Spring Loaded Connectors Mill-Max 815 and 817 Ultra-Low Profile Spring-Loaded (Pogo) Connectors are a practical solution for board-to-board or device-to-board connections. The trend toward miniaturization in electronic packaging demands ever smaller interconnects that deliver high-quality performance. The modular contacts are for use on a 2.54mm grid, available in a height of 2.54mm, and supplied in single and double row contact strips.