At One Click Purchasing, we are your reliable source for the NSN part 21143 manufactured by Walker Mfg Co. We carry a wide range of popular NSN items on our website, including Muffler Exhaust like part number 21143 which is listed with the NSN 2990002586486 for easy identification. If you are interested in 21143 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.