At One Click Purchasing, we are your reliable source for the NSN part 21687 manufactured by M P Pumps Inc. We carry a wide range of popular NSN items on our website, including Shaft Shouldered like part number 21687 which is listed with the NSN 3040013201765 for easy identification. If you are interested in 21687 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.