MIL-DTL-38999 Series II connectors offer high-performance connectivity with up to 128 contacts in an environmentally sealed insert. Designed for harsh environments, these connectors feature various mounting options including front wall, rear wall, jam nut, and box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for reliable connection. The aluminum shells come with a choice of plating options such as electroless nickel and cadmium finishes, meeting RoHS certification standards. With a wide operating temperature range of -65°C to 200°C, these connectors are ideal for demanding applications where durability and performance are essential.