MIL-DTL-38999 Series II connectors with up to 128 contacts offer durable environmental sealing for reliable performance in harsh conditions. Designed for temperatures ranging from -65 °C to 200 °C, these connectors feature various mounting options including front and rear wall mount, jam nut, and box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. Constructed with aluminum shells and offering a range of plating options, including RoHS certified finishes, these connectors ensure optimal conductivity and longevity. Suitable for military and industrial applications, they guarantee 500 mating cycles and feature a straight plug configuration with gold-plated contacts for efficient signal transmission.