MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With an operating temperature range of -65 °C to 200 °C, these connectors offer reliability in extreme conditions. Available in various mounting styles, including front and rear wall mount, jam nut, and box mount receptacles, they cater to diverse applications. The connectors, with aluminum shells and RoHS compliant plating options, ensure durability and performance. Utilizing M39029 rear release crimp contacts, they guarantee secure connections. Ideal for military and industrial use, these connectors provide EMI/RFI shielding and are rated for 500 mating cycles, meeting stringent quality standards.