At One Click Purchasing, we are your reliable source for the NSN part S664NB21 manufactured by Umpco Inc. We carry a wide range of popular NSN items on our website, including Clamp Loop like part number S664NB21 which is listed with the NSN 5340011680918 for easy identification. If you are interested in S664NB21 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.