The MS A&B series is a general duty circular connector manufactured to meet Mil-C-5015. It houses a plastic insulator and designed to maintain the machined solder cup contact orientation during soldering. The shell components are fabricated from high grade aluminum alloy to provide a robust solution for all unsealed applications. The contacts are machined for strength and durability and plated with silver to maintain signal integrity. The shells are plated with an environmental green or our RoHS black zinc plating.