At One Click Purchasing, we are your reliable source for the NSN part 5640 manufactured by Howell Laboratories Inc. We carry a wide range of popular NSN items on our website, including Printed Wiring Boar like part number 5640 which is listed with the NSN 5998013876635 for easy identification. If you are interested in 5640 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.