MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert that is environmentally sealed. With an operating temperature range from -65°C to 200°C, they offer reliable performance in extreme conditions. Available in various mounting options including front and rear wall mount, jam nut, and box mount receptacles, these connectors are versatile and durable. Utilizing M39029 rear release crimp contacts, they ensure secure connections. Constructed with aluminum shells and offering different plating options, such as electroless nickel and cadmium finishes, they meet stringent military specifications. Ideal for military and industrial applications, these connectors provide EMI/RFI shielding and have a long mating life of 500 cycles. The RoHS compliant models cater to environmental standards, making them a reliable choice for demanding environments.