D12107319 is a jackpost assembly designed for in-line connections in D-subminiature connectors. The assembly consists of one rectangular nut, one jackpost, and one #4-40 lock washer, all constructed from brass with a nickel finish. The jackpost features #4-40 UNC-2B and #4-40 UNC-2A threading, with a rectangular nut measuring 5.00 mm (0.197 inch) across flats and a jackpost height of 11.00 mm (0.433 inch). Two units are required per connector, providing reliable mechanical fastening and electrical continuity for D-subminiature connector assemblies in telecommunications, military, and industrial applications.