The MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert. With front wall mount, rear wall mount, and jam nut receptacles, they offer versatility in installation. These connectors, compliant with military specification MIL-DTL-38999 I, are constructed with high-strength aluminum shells and are environmentally sealed for reliable performance. Operating in temperatures ranging from -65°C to 200°C, they are suitable for a wide range of applications. Available in various plating options, including cadmium-free finishes, they ensure durability and conductivity. Utilizing M39029 rear release crimp contacts, they offer secure and efficient connections. With a mating type of bayonet coupling, they provide ease of use in demanding scenarios. Ideal for applications requiring environment-resistant box and through bulkhead mounting receptacles, these connectors guarantee high performance and longevity in challenging conditions.