MIL-DTL-38999 Series II connectors offer robust connectivity with up to 128 contacts in an insert, designed for harsh environments. With an operating temperature range from -65 °C to 200 °C, these connectors are ideal for demanding applications. Featuring various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, they provide versatility in installation. Available in 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts, ensuring reliable connections. Constructed with aluminum shells and offering multiple plating options including cadmium-free finishes, they meet stringent quality standards. Suitable for military and industrial use, these connectors are designed for durability, with a mating life of 500 cycles and environment-resistant features.