MIL-DTL-38999 Series II connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating temperature range of -65°C to 200°C. Available in various mounting styles, including front and rear wall mount, jam nut, and box mount receptacles, they offer versatility in connectivity solutions. With 52 insert arrangements and M39029 rear release crimp contacts, these connectors ensure reliable performance. The aluminum shells come with plating options like cadmium and nickel for enhanced durability. RoHS compliant finishes are also offered. Ideal for military and industrial applications, these connectors provide secure and conductive socket connections, with a mating life of 500 cycles.