At One Click Purchasing, we are your reliable source for the NSN part 520MOD manufactured by Aquamatic Inc. We carry a wide range of popular NSN items on our website, including Valve Y like part number 520MOD which is listed with the NSN 4820015419472 for easy identification. If you are interested in 520MOD 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.