At One Click Purchasing, we are your reliable source for the NSN part 540042 manufactured by E And M Laboratories. We carry a wide range of popular NSN items on our website, including Radio Fr Circulator like part number 540042 which is listed with the NSN 5865002881247 for easy identification. If you are interested in 540042 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.