MIL-DTL-38999 Series I connectors offer rugged performance with up to 128 contacts, ideal for harsh environments. Featuring front and rear wall mount options, as well as jam nut receptacles, they ensure secure connections. Utilizing M39029 rear release crimp contacts, these connectors come in various shell sizes and insert arrangements, with plating options including cadmium-free finishes. With a wide operating temperature range of -65 °C to 200 °C, they are suitable for diverse applications. The high-strength aluminum shells and gold-plated contacts guarantee reliability, while their bayonet coupling mechanism allows for easy mating. These circular connectors, compliant with military specification MIL-DTL-38999 I, are designed for demanding environments, offering durability and performance.