Data Sheet BAC/PSU/007 Data Sheet Download Resource Login to download this resource Username Enter your Curtiss-Wright Defense Solutions username. Password Enter the password that accompanies your username. Forgot password? Don’t have an account? Register here. The BAC/PSU/007 is the recommended backshell for CON/PSU/007 standard power supply unit mating connectors. The backshell helps to prevent wires from becoming frayed or damaged, while a clamp bar provides strain relief.