At One Click Purchasing, we are your reliable source for the NSN part 644D manufactured by Friction Materials Standards Institute Inc. We carry a wide range of popular NSN items on our website, including Lining Friction like part number 644D which is listed with the NSN 2530007342191 for easy identification. If you are interested in 644D 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.