MIL-DTL-38999 Series II connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65°C to 200°C. Offering various mounting options like front and rear wall mount, jam nut, and box mount receptacles, these connectors ensure secure connections in military and aerospace applications. Available in aluminum shells with plating options including cadmium and nickel, they meet stringent RoHS standards. Utilizing M39029 rear release crimp contacts, they guarantee reliable performance with 500 mating cycles. Suitable for back panel and wall mounting, these connectors, with gold-plated contacts and conductive properties, are ideal for critical communication and power transmission needs.