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. Offering various mounting options including front and rear wall mount, jam nut, and box mount receptacles, they ensure secure connections. Available in 9 shell sizes with 52 insert arrangements, these connectors utilize M39029 rear release crimp contacts. Made of aluminum with plating options like cadmium and nickel, they meet RoHS standards for environmental compliance. Ideal for military and industrial applications, they guarantee reliable performance with 500 mating cycles and EMI/RFI shielding for optimal signal integrity.