At One Click Purchasing, we are your reliable source for the NSN part 503-120 manufactured by Ohio Auto Parts Co. We carry a wide range of popular NSN items on our website, including Hose Nonmetallic like part number 503-120 which is listed with the NSN 4720007278234 for easy identification. If you are interested in 503-120 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.