At One Click Purchasing, we are your reliable source for the NSN part 406638 manufactured by American Standard Inc. We carry a wide range of popular NSN items on our website, including Gearshaft Helical like part number 406638 which is listed with the NSN 3040001023022 for easy identification. If you are interested in 406638 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.