At One Click Purchasing, we are your reliable source for the NSN part 121939 manufactured by Brockway Motor Trucks. We carry a wide range of popular NSN items on our website, including Washer Flat like part number 121939 which is listed with the NSN 5310004479380 for easy identification. If you are interested in 121939 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.