The MIL-DTL-38999 Series II connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Offering various receptacle styles including front wall mount, rear wall mount, jam nut, and box mount options, these connectors ensure secure connections. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 12 for versatility. Constructed with aluminum shells and plated in options such as cadmium and nickel, they guarantee durability and reliability. RoHS compliant finishes are also available. Suitable for military and industrial applications, these connectors provide efficient connectivity in demanding conditions.