Marathon Special Products Navy Class (A-A-59125) / (MIL-T-55164) molded material is MAI-60 in accordance with MIL-M-14 (Molded material is GDI30F). Nuts and connectors are provided when appropriate. They are unplated brass and shipped unassembled. A-A-59125 superseded MIL-T-55164-C in 1997. These terminal blocks are compliant to the A-A-59125 standard and are constructed to meet both standards.