At One Click Purchasing, we are your reliable source for the NSN part B18.6.3 manufactured by American National Standards. We carry a wide range of popular NSN items on our website, including Nut Plain Square like part number B18.6.3 which is listed with the NSN 5310006391089 for easy identification. If you are interested in B18.6.3 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.