MIL-DTL-38999 Series II connectors offer rugged performance with up to 128 contacts in an environmentally sealed insert. Operating in extreme temperatures ranging from -65 °C to 200 °C, these connectors are ideal for harsh environments. Featuring various mounting options including front and rear wall mounts, jam nuts, and box mounts, they provide versatility in installation. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts for reliable connections. Constructed with aluminum shells and offering multiple plating options, including RoHS certified finishes, they ensure durability and compliance with environmental standards. Suitable for military and industrial applications, these connectors guarantee secure and efficient electrical connectivity.