The MIL-DTL-38999 Series II connectors are designed for harsh environments, with up to 128 contacts sealed for protection. Operating reliably in temperatures ranging from -65 °C to 200 °C, these connectors offer versatility in various applications. Featuring front and rear wall mounts, jam nuts, and box mounts, they provide secure connections. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts, ensuring efficient signal transmission. Constructed with aluminum shells and offering plating options like electroless nickel and cadmium, they meet stringent military specifications. With gold-plated removable crimp contacts, these connectors guarantee conductivity and durability, making them ideal for demanding environments.