The 3-1827233-6 is a 440-way 4-row 0.5mm Free Height Vertical Plug with gold-plated copper alloy contacts and surface mount termination. This FH series connector comes with black high temperature thermoplastic housing and tin-plated solder tail, designed for parallel board to board stacking applications that require high density. The 0.5mm FH product is specified by the PICMG COM Express standard as the module to carrier card interface.