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 options like front/rear wall mount, jam nut, and box mount receptacles, they offer versatility. With 52 insert arrangements and M39029 rear release crimp contacts, customization is seamless. Constructed with aluminum shells and plated in options like cadmium and nickel, they ensure durability. The straight plug design with bayonet coupling, gold-plated contacts, and RoHS compliant finishes, guarantee reliable performance. Suitable for military applications, these connectors are vital for maintaining secure electrical connections in demanding conditions.