The MIL-DTL-38999 Series II connectors offer high-performance connectivity with up to 128 contacts in an environmentally sealed insert. Designed for harsh environments, these connectors feature various mounting options such as front and rear wall mount, jam nut, and box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for reliable connections. With a wide operating temperature range (-65 °C to 200 °C) and durable aluminum shells, they provide secure and efficient electrical transmission. Offering RoHS compliant finishes, including gold plating, electroless nickel, and anodized aluminum, these connectors ensure longevity and performance in demanding applications.