Amphenol Aerospace Hermetic Circular Connectors maintain system integrity in applications where reliability and performance are critical, such as gas-tight barriers or areas with high-pressure differentials. A wide range of materials and manufacturing capabilities are used to provide consumer and MIL-Spec products for glass-to-metal seals and lightweight epoxy backfilled solutions. The epoxy-sealed connectors are a lightweight alternative to glass-sealed hermetic connectors for use in avionics and other weight-sensitive applications where a high level of sealing is required. Epoxy-sealed connectors are an optimal solution when increasingly stringent sealing requirements must be met.