MIL-DTL-38999 Series II connectors are designed for harsh environments, offering up to 128 contacts in a single insert. With a wide operating temperature range of -65°C to 200°C, these connectors are ideal for demanding applications. Featuring various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, they provide flexibility in installation. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts for reliable connectivity. Constructed with aluminum shells and offered in different plating options including cadmium-free finishes, these connectors ensure durability and compliance with RoHS standards. Suitable for military and industrial use, they guarantee high performance with 500 mating cycles and environment-resistant properties.