At One Click Purchasing, we are your reliable source for the NSN part B640-158 manufactured by L3 Communications Corp. We carry a wide range of popular NSN items on our website, including Relay Electromagnet like part number B640-158 which is listed with the NSN 5945008384421 for easy identification. If you are interested in B640-158 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.