MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, offering environmental sealing and a wide operating temperature range from -65 °C to 200 °C. Available in various shell sizes and insert arrangements, these connectors come in high-strength aluminum shells with options for plating, including cadmium-free finishes. The connector family includes front and rear wall mount as well as jam nut receptacles, all designed for harsh environments. Utilizing M39029 rear release crimp contacts, they ensure reliable connectivity, with mating facilitated by bayonet coupling. These circular receptacles are ideal for applications requiring durability and performance in challenging conditions.