MIL-DTL-38999 Series II connectors are designed for rugged environments, offering up to 128 contacts in a sealed insert. With a wide operating temperature range of -65 °C to 200 °C, these connectors are ideal for harsh conditions. Featuring various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, they provide versatility in installation. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts for reliable connections. Made of aluminum with plating options including cadmium and nickel, they ensure durability and performance. RoHS compliant finishes are also available. Suitable for military and industrial applications, these connectors are essential for maintaining secure and efficient electrical connections in demanding environments.