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 mounting styles including front and rear wall mount, jam nut, and box mount receptacles, they offer versatility in connectivity solutions. These connectors come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts. Constructed with aluminum shells and offering multiple plating options, including cadmium-free finishes, they ensure durability and reliability. With gold-plated removable crimp contacts and bayonet coupling, they provide secure and efficient electrical connections. Suitable for military and industrial applications, these connectors are designed for extended service life and optimal performance in demanding environments.