For applications that require multiple boards to be connected, Mill-Max offers board stacking sockets. Precision machined organic fiber plug receptacles are inserted into housings which are soldered to plated through-holes on the PC board. When a mating header is installed, the leads will knock out the fiber plug and continue to pass through the receptacle. Ensuring the leads are long enough, the same header can be installed into the next PC board, creating a pluggable three-board solution.