MIL-DTL-38999 Series I connectors offer reliable performance in harsh environments with up to 128 contacts sealed for environmental protection. Operating temperatures ranging from -65 °C to 200 °C make them suitable for a wide range of applications. Featuring various mounting options, including front and rear wall mount as well as jam nut receptacles, these connectors meet stringent military specifications. With 52 insert arrangements and M39029 rear release crimp contacts, they ensure secure and efficient connectivity. Available in nine shell sizes and offering multiple plating options, such as cadmium-free finishes, these connectors are versatile and durable. The high-strength aluminum shells and gold-plated contacts guarantee long-lasting performance, with a service rating of M for environmental resistance.