MIL-DTL-38999 Series II connectors feature up to 128 contacts housed in an environmentally sealed insert, designed for extreme operating conditions ranging from -65 °C to 200 °C. These connectors, compliant with military specification MIL-DTL-38999 II, offer various receptacle options including front and rear wall mount, jam nut, and box mount configurations. Available in 9 shell sizes with 52 insert arrangements, they utilize M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 12. Constructed with durable aluminum shells, they come with a range of plating options, from cadmium finishes to RoHS-certified alternatives. With features like bayonet coupling, gold-plated removable crimp contacts, and anodized shell coating, these connectors are ideal for applications requiring high reliability in harsh environments.