The MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With a wide operating temperature range of -65°C to 200°C, they ensure reliable performance in extreme conditions. Available in various configurations including front and rear wall mount receptacles, as well as jam nut receptacles, these connectors offer versatility for different applications. Utilizing M39029 rear release crimp contacts, they guarantee secure connections in sizes 22D, 22M, 22, 20, 16, and 8. Constructed with high-strength aluminum shells and offering multiple plating options such as cadmium and nickel, they meet stringent military specifications. RoHS compliant finishes are also available, making them environmentally friendly. With a service rating of M and a service class of E, these connectors are ideal for demanding environments requiring rugged and reliable electrical connections.