MIL-DTL-38999 Series I connectors offer high-performance connectivity with up to 128 contacts in a secure environmentally sealed insert. Designed for harsh environments, these connectors feature front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. With a wide operating temperature range of -65°C to 200°C, they provide reliable functionality in extreme conditions. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for easy installation. The connectors are constructed with high-strength aluminum shells and come in various plating options, including cadmium-free finishes for RoHS compliance. Suitable for military and industrial applications, these connectors ensure durable and efficient electrical connections in challenging settings.