MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating temperature range of -65°C to 200°C. Available in various shell sizes and insert arrangements, these connectors offer front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. Constructed with high-strength aluminum shells, they come in multiple plating options including gold, electroless nickel, and anodized aluminum, meeting RoHS compliance standards. The connectors, with removable crimp contacts, ensure reliable connectivity with a mating life of 500 cycles. Suitable for box mounting and through bulkhead applications, they provide environment-resistant protection for critical electrical connections.