The MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With an operating temperature range of -65°C to 200°C, these connectors are suitable for a wide range of applications. Available in various shell sizes and insert arrangements, they offer versatility in design. Constructed with high-strength aluminum shells and offered in different plating options, including RoHS-compliant finishes, these connectors ensure durability and reliability. Suitable for military and industrial use, they come in different mounting options, such as front wall mount, rear wall mount, and jam nut receptacles, accommodating diverse installation requirements. The use of M39029 rear release crimp contacts ensures secure connections, while the bayonet coupling mechanism allows for easy mating. Whether for box mounting or through bulkhead applications, these connectors provide excellent conductivity and ingress protection, making them ideal for demanding environments.