The MIL-DTL-38999 Series II connectors offer reliable connectivity in harsh environments, featuring up to 128 contacts in an insert. With a wide operating temperature range of -65°C to 200°C, these circular receptacles come in various mounting options, including front and rear wall mount, jam nut, and box mount configurations. Designed for military specifications, they ensure durability and performance, with gold-plated contacts for optimal conductivity. Available in aluminum shells with multiple plating options, including RoHS-compliant finishes, these connectors are suited for demanding applications where environmental resistance is crucial.