At One Click Purchasing, we are your reliable source for the NSN part AN20 manufactured by Castle A M And Co. We carry a wide range of popular NSN items on our website, including Reducer Tube like part number AN20 which is listed with the NSN 4730002649171 for easy identification. If you are interested in AN20 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.