Covers a range of connectors with 2.54 mm (0.1 in) spacing intended to connect a double-sided printed board to another printed board or wires.Two kinds of connector are available:-One-part edge-socket connector: Fixed connector or (female) receptacle is intended to mate with edge-board contacts.-Two-part connector: Fixed connector or (female) receptacle is intended to mate with free connector of board-mounted (male) connector.For these two cases, fixed connectors or (female) receptacles are the same.