At One Click Purchasing, we are your reliable source for the NSN part B-4JN manufactured by Nupro Inc. We carry a wide range of popular NSN items on our website, including Valve Regulating Fl like part number B-4JN which is listed with the NSN 4820013932711 for easy identification. If you are interested in B-4JN 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.