The MIL-DTL-38999 Series II connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65°C to 200°C. Available in various receptacle types including front and rear wall mount, jam nut, and box mount, they offer versatility for different applications. These connectors come in 9 shell sizes with 52 insert arrangements, utilizing M39029 rear release crimp contacts. Constructed with aluminum shells and offering plating options such as cadmium and nickel, they provide reliable performance. With a bayonet coupling mechanism and gold-plated removable crimp contacts, they ensure secure connections. Suitable for military and industrial use, these connectors are built to withstand tough conditions with their environment-resistant design and RoHS compliant finishes.