The 620-053UC20C-415A is a circular micro-d connector with 8 contacts, a panel mount, and a bayonet-lock coupling. It is manufactured by Glenair, Inc., and is part of their 620 Series. The connector is a MIL-SPEC qualified, nickel-plated aluminum construction, with gold-plated contacts, and insulation resistance of 1000 Megaohms. It has a shell size of 0.311 inches, and is designed to accommodate a wire size range of 17 AWG to 20 AWG.