At One Click Purchasing, we are your reliable source for the NSN part 21157 manufactured by Smiths Aerospace Ltd. We carry a wide range of popular NSN items on our website, including Circuit Card Assemb like part number 21157 which is listed with the NSN 5998010978508 for easy identification. If you are interested in 21157 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.