MIL-DTL-38999 Series I connectors offer durable and high-performance solutions for demanding environments. With up to 128 contacts in an insert, these connectors are designed to be environmentally sealed, ensuring reliable operation in harsh conditions. Featuring a wide operating temperature range from -65 °C to 200 °C, they are suitable for a variety of applications. Available in various shell sizes and insert arrangements, they use M39029 rear release crimp contacts for secure connections. The connectors come in high-strength aluminum shells with options for different plating finishes, including cadmium-free alternatives. Their construction meets stringent military specifications for quality and performance, making them ideal for aerospace, defense, and other critical industries.