The MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With an operating temperature range of -65°C to 200°C, they offer reliable performance in extreme conditions. Available in various shell sizes and insert arrangements, these connectors come in high-strength aluminum shells with options for plating such as gold, electroless nickel, and cadmium-free finishes. Their bayonet coupling mechanism and wall mounting options make them versatile for diverse applications. Certified to military specification MIL-DTL-38999 I, they ensure durability and longevity with 500 mating cycles. Suitable for use in environments requiring conductivity and ingress protection, these connectors are ideal for critical electrical connections.