At One Click Purchasing, we are your reliable source for the NSN part A639 manufactured by Avionics Inc. We carry a wide range of popular NSN items on our website, including Insulator Washer like part number A639 which is listed with the NSN 5970002847900 for easy identification. If you are interested in A639 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.