The MIL-DTL-38999 Series II connectors are designed for demanding environments, offering up to 128 contacts in a single insert. With a wide operating temperature range of -65°C to 200°C, these connectors are ideal for use in harsh conditions. Available in various mounting styles such as front and rear wall mount, jam nut, and box mount receptacles, they provide versatility in installation. Featuring durable aluminum shells and multiple plating options including gold, electroless nickel, and cadmium finishes, these connectors ensure reliable performance. With M39029 rear release crimp contacts in various sizes, they offer flexibility in contact arrangements. The Bayonet coupling mechanism and removable crimp contacts make mating and maintenance easy, with a mating life of 500 cycles. Suitable for potting applications, these connectors are designed for military and industrial use, meeting stringent MIL-DTL-38999 II specifications.