The MIL-DTL-38999 Series II connectors are designed for rugged environments, featuring up to 128 contacts in an insert and offering secure environmental sealing. With a wide operating temperature range from -65 °C to 200 °C, these connectors ensure reliable performance in extreme conditions. Available in various mounting options such as front and rear wall mount, jam nut, and front box mount receptacles, they cater to diverse installation requirements. The connectors come in aluminum shells with a selection of plating options, including cadmium-free finishes, meeting RoHS compliance. Utilizing M39029 rear release crimp contacts, they provide efficient connectivity with sizes 22D, 22M, 22, 20, 16, and 12. Ideal for military and industrial applications, these connectors offer durability, EMI/RFI shielding, and a service rating of M, making them suitable for demanding environments.