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 configurations including front and rear wall mounts, as well as jam nut receptacles, they ensure reliable connectivity in demanding conditions. Utilizing M39029 rear release crimp contacts, these connectors come in 9 shell sizes and 52 insert arrangements. Constructed with high-strength aluminum shells and offering plating options like electroless nickel and cadmium finishes, they guarantee durability and performance. RoHS certified versions are also available, making them environmentally friendly choices for military and aerospace applications.