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 options like front and rear wall mount, jam nut, and box mount receptacles, they offer versatility for different applications. With 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 12. Made of aluminum, they come in plating options including cadmium-free finishes, ensuring environmental compliance. These circular connectors, meeting military specification MIL-DTL-38999 II, are ideal for demanding electrical connectivity needs in diverse settings.