DEUTSCH MIL-DTL-38999 Series subminiature circular connectors offer a scoop-proof design for easy, reliable mating and a threaded coupling for excellent vibration resistance. They are available in three families distinguished by shell materials. DTS Series: Lightweight aluminum shells for environmentally sealed versions and stainless steel for hermetic versions. DTS-K and DTS-S Series: Stainless steel shells meeting the requirements of Classes K and S, suitable for firewall and high-temperature applications such as engines. ACT Series: Composite shells, offering the lightest weight and highest resistance to corrosion. Inserts are available in nine shell sizes, with contact arrangements meeting MIL-DTL-1560, along with additional arrangements, to help maximize flexibility in circuit configurations.