Specifies the characteristics of interface connections for tank containers. Coverage includes: definitions; flange connections for containers of tank type codes 70 to 77 and 85 to 88; Man-hole openings and man-hole lids for tank containers of type codes 70 to 76 and 85 to 88; and Inlet and outlet connection screw threads for tank containers of type codes to 70 to 76 and 85 to 88. Also includes an annex, tables and diagrams.