The MIL-DTL-38999 Series II connectors are designed for harsh environments, with up to 128 contacts housed in an insert for secure connectivity. Featuring front and rear wall mount options, as well as jam nut receptacles, they offer versatility in installation. These connectors, with an operating temperature range of -65°C to 200°C, are ideal for demanding applications. Available in various shell sizes and insert arrangements, they use M39029 rear release crimp contacts for reliable performance. Constructed with aluminum shells and offered in RoHS compliant plating options, including cadmium-free finishes, they ensure durability and environmental compliance. Suitable for military and industrial use, these connectors provide a high level of conductivity and ingress protection, with a service rating of I for reliable operation.