The Amphenol PT series and PT-SE series connectors (MIL-DTL-26482 Series I) feature high-density contact arrangements within a circular shell. The PT series provides solder contacts, while PT-SE offers high-performance crimp contacts, and PT-CE offers a commercial crimp option. These circular connectors utilize quick-disconnect bayonet coupling for easy mating and un-mating, and are available in various mounting styles and shell sizes.