MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, offering environmental sealing and a wide operating temperature range from -65°C to 200°C. Available in various shell sizes and insert arrangements, they include M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8 (coax and twinax). These rugged connectors come in high strength aluminum shells with options for plating, such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum. Designed for harsh environments, they include front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. RoHS certified cadmium-free finishes are available, ensuring compliance with environmental regulations. Ideal for military and industrial applications, these connectors provide reliable performance with a mating life of 500 cycles and conductivity for efficient signal transmission.