The MIL-DTL-38999 III (D38999) harsh environment connectors offer rugged reliability for demanding applications. Featuring wall mount receptacles, jam nut receptacles, and straight self-locking RFI plugs, they come in 9 shell sizes and 54 insert arrangements. Utilizing M39029 contacts in various sizes, these connectors are designed for versatility. Available in aluminum, stainless steel, and lightweight composite shells with a range of plating options, including cadmium-free finishes, they meet RoHS compliance and Boeing BACC standards. With a temperature range from -65°C to 175°C and 500 mating cycles, these connectors ensure high performance in challenging environments.