At One Click Purchasing, we are your reliable source for the NSN part 123-664 manufactured by Avionics Specialist Inc. We carry a wide range of popular NSN items on our website, including Synchro Differentia like part number 123-664 which is listed with the NSN 5990010853765 for easy identification. If you are interested in 123-664 item, then take the advantage of our online RFQ service, or peruse our website as you see fit to find other items of interest that you may wish to learn more about.