The MIL-DTL-38999 Series II connectors feature up to 128 contacts within an environmentally sealed insert, designed for harsh environments with an operating temperature range between -65 °C and 200 °C. Offering various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, these connectors ensure versatility in use. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for reliable connectivity. Constructed with aluminum shells and offering multiple plating options including cadmium-free finishes, these connectors guarantee durability and performance. With a mating type of bayonet and contact gender of male, they are suitable for a wide range of applications requiring secure electrical connections in challenging conditions.