At One Click Purchasing, we are your reliable source for the NSN part 21039B manufactured by Kelsey Hayes Company Inc. We carry a wide range of popular NSN items on our website, including Cap Grease like part number 21039B which is listed with the NSN 2530002043634 for easy identification. If you are interested in 21039B 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.