MIL-DTL-38999 Series I connectors offer high-performance connectivity in harsh environments, featuring up to 128 contacts sealed for environmental protection. With a wide operating temperature range of -65 °C to 200 °C, these connectors are reliable in extreme conditions. Available in various shell sizes and insert arrangements, they accommodate M39029 rear release crimp contacts for secure connections. The connectors, made of durable aluminum, come with multiple plating options including cadmium-free finishes, ensuring longevity and compliance with RoHS standards. Ideal for military and aerospace applications, they provide efficient signal transmission with gold-plated contacts and a mating type of bayonet coupling. The versatile design includes wall mount, jam nut, and RFI grounding plug receptacles, suitable for various installation requirements. Meeting MIL-DTL-38999 I specifications, these circular connectors guarantee optimal performance in demanding environments.