The MIL-DTL-38999 Series I connectors offer reliable performance in harsh environments with up to 128 contacts in an insert. Designed for military specifications, these connectors feature front and rear wall mount options, as well as jam nut receptacles for secure installations. With a wide operating temperature range from -65 °C to 200 °C, they ensure functionality in extreme conditions. Available in 9 shell sizes and 52 insert arrangements, these connectors utilize M39029 rear release crimp contacts, providing versatility for various applications. Constructed with high-strength aluminum shells and offering multiple plating options, including cadmium-free finishes, they meet RoHS compliance standards. Suitable for back panel box mounting with bayonet coupling, these connectors are ideal for military and aerospace applications requiring rugged and reliable electrical connections.