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 the PT-SE Series offers high-performance crimp contacts, and the PT-CE Series includes a commercial crimp option. These circular connectors utilize a quick-disconnect bayonet coupling mechanism for fast mating and unmating, and they come in various mounting styles and shell sizes.