Marathon Special Products Stud Series Military Terminal Blocks use studs or threaded posts for making connections. Instead of securing wires with screws, wires are usually connected by attaching them to threaded studs or posts, which are then secured with nuts. Nuts and connectors are provided when appropriate. They are unplated brass and shipped unassembled. The molded material used in this product is MAI-60 in accordance with military specification MIL-M-14. These terminal blocks are compliant with military specification A-A-59125.