Across industries such as transportation, fluid power, aerospace, medical and energy exploration, metal-to-metal sealing plugs fulfill mission critical functions. In any system constructed from a solid metal block, with channels that have been cast and drilled for fluid conveyance, proper sealing plug selection will prevent equipment damage, prevent fluid leakage, reduce energy consumption, save money and ensure proper system operation. This white paper provides details on the design considerations, risk factors and costs associated with some of the most common metal-to-metal seal options.