MIL-DTL-38999 Series II connectors offer rugged reliability with up to 128 contacts in an environmentally sealed insert. Designed for harsh environments, these connectors feature various mounting options like front and rear wall mount, jam nut, and box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts for secure connections. Built for durability, the aluminum shells come with plating options including cadmium and nickel finishes. With a wide operating temperature range of -65°C to 200°C, these connectors are ideal for military and aerospace applications. RoHS compliant options are also available.