MIL-DTL-38999 Series I connectors feature up to 128 contacts within an environmentally sealed 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 and rear wall mount options, as well as jam nut receptacles. Utilizing M39029 rear release crimp contacts, they ensure secure connections with sizes ranging from 22D to 8, including coax and twinax configurations. Constructed with high-strength aluminum shells, they come in different plating options such as cadmium and nickel, meeting RoHS compliance standards. Perfect for military and industrial applications, these circular connectors guarantee reliability with a service life of 1500 cycles.