The 7717-178-NG is a standard mounting pad specifically designed for 3-lead TO-5 components. Constructed from durable nylon, this pad has an outside diameter of 8.89 mm (0.350 inches) and a thickness of 0.53 mm (0.021 inches). The design features three through-holes for the component leads, each with a diameter of 1.14 mm, arranged on a 5.08 mm bolt circle. These pads are used to provide mechanical support, accurate positioning, and electrical isolation for components in printed circuit board assemblies.