At One Click Purchasing, we are your reliable source for the NSN part AAT-400-420 manufactured by Sikorsky Aircraft Corporation. We carry a wide range of popular NSN items on our website, including Insert Screw Thread like part number AAT-400-420 which is listed with the NSN 5325001931321 for easy identification. If you are interested in AAT-400-420 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.