MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert for robust connectivity. Certified to military specification MIL-DTL-38999 II, these circular receptacles are ideal for applications requiring high performance under extreme conditions. With a wide operating temperature range of -65 °C to 200 °C, they offer reliable functionality in demanding settings. Available in various mount types such as front and rear wall mount, jam nut, and box mount receptacles, they provide versatility for different installation requirements. The connectors come in 9 shell sizes and 52 insert arrangements, accommodating various contact sizes including 22D, 22M, 22, 20, 16, and 12. Constructed with aluminum shells and offering options for plating finishes like gold, electroless nickel, and cadmium-free coatings, they ensure durability and corrosion resistance. Featuring bayonet coupling and removable crimp contacts, these connectors guarantee secure and efficient connections. Suitable for military and industrial applications, the MIL-DTL-38999 II connectors meet stringent performance standards for reliability in critical operations.