MIL-DTL-38999 Series II connectors offer reliable performance in harsh environments, featuring up to 128 contacts in an insert. With environmental sealing and a wide operating temperature range of -65°C to 200°C, these connectors are ideal for demanding applications. Available in various mounting styles such as front and rear wall mount, jam nut, and box mount receptacles, they ensure versatility in installation. The connectors, with 9 shell sizes and 52 insert arrangements, utilize M39029 rear release crimp contacts for secure connections. Constructed with aluminum shells and offering multiple plating options including cadmium-free finishes, they meet stringent military specifications. These connectors, with gold-plated contacts and conductivity, guarantee reliable signal transmission. Suitable for Box and Through Bulkhead Mounting Receptacle Types, they are essential for maintaining connectivity in challenging environments.