The MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert for secure connectivity. With front and rear wall mount options, as well as jam nut and box mount receptacles, they offer versatile installation. Operating within a wide temperature range from -65°C to 200°C, these connectors are ideal for demanding applications. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts for reliable performance. Constructed with aluminum shells and various plating options, including RoHS compliant finishes, they ensure durability and compliance. The straight plugs, with options for RFI grounding, offer flexibility in cable management. With a gold contact plating and a maximum mating life of 500 cycles, these connectors guarantee efficient and long-lasting connectivity in critical military and industrial environments.