MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert. With front and rear wall mount options, as well as jam nut and box mount receptacles, they offer versatility in installation. These connectors, made with aluminum shells, are environmentally sealed and can operate in temperatures ranging from -65 °C to 200 °C. Available in various plating options, including RoHS compliant finishes, they ensure reliable connectivity. Utilizing M39029 rear release crimp contacts, they guarantee secure connections with male pin contact style. Suitable for military and industrial applications, they have a service rating of II and are ideal for environment-resistant box and through bulkhead mounting receptacle types. With a conductivity rating of conductive and a mating life of 500 cycles, they meet stringent performance standards.