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 such as front and rear wall mount, jam nut, and box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts for reliable connections. The aluminum shells come with a choice of plating options, including cadmium-free finishes for RoHS compliance. With a wide operating temperature range of -65 °C to 200 °C, these connectors are ideal for demanding applications in military and aerospace industries.