MIL-DTL-38999 Series I connectors offer robust connectivity with up to 128 contacts, featuring environmental sealing for reliable performance in harsh conditions. Designed for versatility, they come in various shell sizes and insert arrangements, accommodating M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8. These connectors, with options for front wall mount, rear wall mount, and jam nut receptacles, are crucial for military and aerospace applications, meeting stringent MIL-DTL-38999 I specifications. Crafted from high strength aluminum with a choice of plating finishes, including cadmium-free options, they ensure durability and conductivity. Operating efficiently in temperatures ranging from -65 °C to 200 °C, these connectors are essential for maintaining secure electrical connections in demanding environments.