MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in front wall mount, rear wall mount, and jam nut receptacles, these connectors come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts. Constructed with high strength aluminum shells, they offer various plating options including cadmium-free finishes. Ideal for military and industrial applications, these connectors ensure reliable performance with gold-plated contacts and a mating type of bayonet coupling. With RoHS certified options, they guarantee compliance with environmental regulations.