MIL-DTL-38999 Series II connectors are designed for harsh environments, boasting up to 128 contacts enclosed in a sealed insert. With an impressive operating range of -65 °C to 200 °C, these connectors offer reliable performance in extreme conditions. Featuring various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, they cater to diverse installation needs. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts for secure connections. Crafted from durable aluminum, these connectors come with plating options including cadmium-free finishes for RoHS compliance. Ideal for military and industrial applications, they ensure connectivity with gold-plated pins and a mating life of 500 cycles. With their conductive nature and environment-resistant design, MIL-DTL-38999 Series II connectors deliver robust and dependable functionality.