At One Click Purchasing, we are your reliable source for the NSN part S640 manufactured by Cummins Inc. We carry a wide range of popular NSN items on our website, including Washer Flat like part number S640 which is listed with the NSN 5310010678485 for easy identification. If you are interested in S640 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.