The MIL-DTL-38999 Series II connectors, designed for harsh environments, feature up to 128 contacts in an insert and offer front and rear wall mount options, as well as jam nut and box mount receptacles. With operating temperatures ranging from -65°C to 200°C, these connectors are suitable for a wide range of applications. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear-release crimp contacts in various sizes. Constructed with aluminum shells and offering options for plating, including cadmium-free finishes, these connectors are durable and reliable. The bayonet coupling, along with gold-plated contacts, ensures secure and efficient connections. Meeting MIL-DTL-38999 II specifications, they provide excellent performance in military and aerospace applications.