At One Click Purchasing, we are your reliable source for the NSN part MK5523 manufactured by Btr Valve Sealants Inc. We carry a wide range of popular NSN items on our website, including Collar Arbor like part number MK5523 which is listed with the NSN 3220001299762 for easy identification. If you are interested in MK5523 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.