At One Click Purchasing, we are your reliable source for the NSN part R21IN manufactured by Itt Grinnell Corp. We carry a wide range of popular NSN items on our website, including Diaphragm Actuator Valve Special Shaped like part number R21IN which is listed with the NSN 4820002522051 for easy identification. If you are interested in R21IN 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.