MIL-DTL-38999 Series II connectors offer reliable performance in harsh environments, with up to 128 contacts housed in a rugged insert. Designed for durability, these connectors are environmentally sealed and can operate in temperatures ranging from -65 °C to 200 °C. Available in various mounting options such as front wall mount, rear wall mount, jam nut, rear box mount, and front box mount receptacles, they ensure flexibility in installation. Featuring nine shell sizes and 52 insert arrangements, these connectors utilize M39029 rear release crimp contacts for secure connections. Constructed with aluminum shells and offering a choice of plating options including cadmium-free finishes, they meet RoHS compliance standards. Ideal for military and industrial applications, MIL-DTL-38999 Series II connectors provide high conductivity and durability, with socket contact style and a mating life of 500 cycles. Suitable for environment-resistant box and through bulkhead mounting receptacle types, they ensure reliable performance in demanding conditions.