At One Click Purchasing, we are your reliable source for the NSN part 21634 manufactured by M P Pumps Inc. We carry a wide range of popular NSN items on our website, including Adapter Flange like part number 21634 which is listed with the NSN 2540002116255 for easy identification. If you are interested in 21634 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.