MIL-DTL-38999 III (D38999) harsh environment connectors consist of wall mount receptacles, jam nut receptacles, and straight self-locking RFI plugs. They are offered in 9 shell sizes and 54 insert arrangements, utilizing M39029 contacts in sizes 22D, 20, 16, 12, 10 power, and 8 twinax. 38999 Series 3 connectors are offered in a variety of shell materials, including aluminum, stainless steel, and lightweight composite. They are also available in a wide assortment of plating options, including olive drab cadmium, nickel, black zinc nickel, and passivated stainless steel. Selection includes RoHS-compliant, cadmium-free finishes, as well as Boeing BACC-approved designs.
Part Aliases: TE Connectivity | Deutsch YACT24JJ20BNV00100
The MIL-DTL-38999 III (D38999) harsh environment connectors, designated as SKU D38999/24JJ20BN, are essential components for rugged connectivity needs. This specific variant is a Jam Nut Receptacle, featuring a robust construction and meeting stringent military specifications. With a high amperage rating of 43 A and a voltage tolerance of 300 V AC, 450 V DC, and 1000 Vrms, they ensure reliable power transmission in demanding conditions. Designed for versatility, they accommodate 30 contacts of various sizes (8(3), 12(4), 16(13), 20(10)) in a size 25 shell, offering triple start threaded mating for secure connections. The cadmium olive drab shell plating enhances durability, while the composite shell construction allows for a wide operating temperature range from -65 to 200 °C (-85 to 392 °F). With their female contact gender and conductive nature, these connectors provide excellent performance in harsh environments, making them ideal for aerospace, defense, and other high-reliability applications.