The Amphenol PT series and PT-SE series connectors (MIL-DTL-26482 Series I) feature high-density circular shell design. The PT series offers solder contacts, while PT-SE provides high-performance crimp contacts, and PT-CE (not specified here) offers a commercial crimp option. These connectors include quick-disconnect bayonet coupling for fast mating and unmating, with various mounting styles and shell sizes available.