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This standard applies to a group of related rectangular, multicontact, two-part printed board connectors with male and female contacts in conjunction with either solder or solderless terminations (such as wrap type). All connectors have the same contact spacing using the basic grid of 2.54 mm (0.100 in). The free connectors feature a relatively new method for the attachement of the connector to the printed board. It is accomplished with a series of cantilever solder tabs, which are distributed evenly on both sides of the board. This new method was adopted to meet the following needs: a) direct replacement of a socket-connector by a two-piece mother and daughter board connector mated set, without requiring major design changes in the packaging-system; b) easy access to both sides of a board without having to use plated-through holes; c) high density packaging, with components on both sides of the board, without the complication of staggered pins and termination pads.