The MIL-DTL-38999 Series I connectors feature a versatile design with up to 128 contacts, providing reliable connectivity in harsh environments. These circular connectors, adhering to military specification MIL-DTL-38999 I, are constructed for durability, with high-strength aluminum shells and a range of plating options including cadmium-free finishes. Offering front wall mount, rear wall mount, and jam nut receptacles, they ensure secure connections in various applications. With an operating temperature range of -65°C to 200°C, they are suitable for demanding conditions. Utilizing M39029 rear release crimp contacts, these connectors come in 9 shell sizes and 52 insert arrangements, accommodating diverse needs. The bayonet coupling mechanism facilitates quick and secure mating, while the gold-plated removable crimp contacts ensure optimal conductivity. Designed for longevity, these connectors have a contact mating life of 500 cycles, making them ideal for critical missions. Whether in military, aerospace, or industrial settings, the MIL-DTL-38999 Series I connectors deliver high performance and environmental resistance, meeting the stringent requirements of mission-critical operations.