The MIL-DTL-38999 III (D38999) harsh environment connectors are designed for rugged applications, offering reliable performance in demanding conditions. Available in various configurations including wall mount receptacles, jam nut receptacles, and straight self-locking RFI plugs, they cater to diverse connectivity needs. With 9 shell sizes and 54 insert arrangements, these connectors accommodate M39029 contacts in sizes 22D, 20, 16, 12, 10 power, and 8 twinax, ensuring compatibility with a range of devices. Crafted from durable materials such as aluminum, stainless steel, and lightweight composite, they provide robust housing options. The assortment of plating choices, including olive drab cadmium, nickel, black zinc nickel, and passivated stainless steel, offers versatility in meeting specific environmental requirements. Featuring RoHS-compliant and cadmium-free finishes, as well as Boeing BACC-approved designs, these connectors prioritize both performance and compliance. Whether in military, aerospace, or industrial settings, the MIL-DTL-38999 III series delivers secure and efficient electrical connections, backed by a service rating of II and service class W. With gold-plated removable crimp contacts, a maximum operating temperature of 175°C, and a minimum of -65°C, they ensure reliable conductivity across a wide range of conditions. The straight plug design, contact gender, and arrangement details further enhance their functionality, making them ideal for critical applications where durability and performance are paramount.