MIL-DTL-38999 Series II connectors feature up to 128 contacts in an environmentally sealed insert, ideal for harsh environments with an operating temperature range of -65°C to 200°C. Available in various mounting options like front and rear wall mount, jam nut, and box mount receptacles, they offer versatility in military and aerospace applications. With 52 insert arrangements and M39029 rear release crimp contacts, these connectors ensure reliable connectivity. The aluminum shells come in different plating options, including RoHS certified finishes, catering to diverse requirements. Designed for durability, they guarantee a mating life of 500 cycles, making them a trusted choice for demanding environments.