I have a 12 inch piece of 6/32 thread all and a flat washer and nut. Push the thread all through the hole, thread the blind nut onto the end of the thread all. Pull the thread all snug to the back of the fire wall. Thread on the flat washer and nut and snug them up to the firewall. Make sure the blind nut is positioned where it needs to be and then thighten up the 6/32 nut until the blind nut is seated into the firewall. Once tight in the firewall, loosen up the 6/32 nut and thread the thread all out of the blind nut. Good luck, Dave