The MIL-DTL-38999 Series I connectors feature up to 128 contacts within an insert, providing robust connectivity in harsh environments. With front wall mount, rear wall mount, and jam nut receptacles, they offer versatile installation options. These circular connectors, compliant with military specification MIL-DTL-38999 I, are designed for durability, with a wide operating temperature range of -65°C to 200°C. Utilizing M39029 rear release crimp contacts in various sizes, including coax and twinax, they ensure reliable signal transmission. Available in 9 shell sizes and 52 insert arrangements, these connectors cater to diverse applications. Constructed with high-strength aluminum shells and offering plating options such as electroless nickel and cadmium finishes, they prioritize performance and longevity. RoHS compliant options are also available, meeting environmental regulations. Suitable for use in demanding settings, these connectors are ideal for aerospace, defense, and industrial applications.