The D38999/26WH55PC L/C part from TE Connectivity is a high-speed, high-density, multi-contact circular connector. It has three key features: high insulation resistance, high vibration and shock performance, and resistance to extreme environmental conditions. It has a shell size of 26, and it has 55 positions, with a size 2 polarization key. This connector is designed to be used in a wide range of demanding applications, including automotive, aerospace, and medical devices. Its contacts are compliant with the MIL-B terminals 85C spec, and feature all-metal construction. The shell is made of lightweight and durable aluminum alloy material, with a stainless steel lockwasher, and a cordset or backshell configurable as needed.