At One Click Purchasing, we are your reliable source for the NSN part 40-399 manufactured by Hydro Aire Inc. We carry a wide range of popular NSN items on our website, including Control Box Assembl like part number 40-399 which is listed with the NSN 1630006724410 for easy identification. If you are interested in 40-399 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.