MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With an operating temperature range of -65°C to 200°C, these connectors offer reliable performance in extreme conditions. Available in various mount types, including front and rear wall mount, jam nut, and box mount receptacles, they provide versatility for different applications. The connectors come in 9 shell sizes and 52 insert arrangements, accommodating M39029 rear release crimp contacts. Constructed with aluminum shells and offering plating options such as electroless nickel and cadmium-free finishes, they meet stringent military specifications. With gold-plated contacts and EMI/RFI shielding, they ensure optimal signal transmission and protection against interference. Suitable for both military and industrial use, these connectors guarantee durability and performance in demanding environments.