The MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert. These circular receptacles, available in wall mount configurations, are ideal for military applications with an operating temperature range of -65°C to 200°C. Constructed with high-strength aluminum shells and offering various plating options, including RoHS-certified finishes, they ensure durability and reliability. Utilizing M39029 rear release crimp contacts, they provide secure connections with superior conductivity. These environment-resistant connectors, classified under Service Class I, are essential for demanding industrial and military environments.