MIL-DTL-38999 Series I connectors feature up to 128 contacts housed in an environmentally sealed insert, with a wide operating temperature range of -65 °C to 200 °C. Available in various shell sizes and insert arrangements, these connectors offer versatility for different applications. Constructed with high-strength aluminum shells and a choice of plating options, including cadmium-free finishes, they ensure durability and reliability in harsh environments. With options for front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, they provide secure connections in military and industrial settings. Utilizing M39029 rear release crimp contacts, these connectors are designed for easy installation and maintenance. The gold-plated contacts guarantee optimal conductivity, while the bayonet coupling design ensures quick and secure mating. Suitable for environment-resistant box and through bulkhead mounting receptacle types, these connectors meet stringent military specifications for performance and reliability.