At One Click Purchasing, we are your reliable source for the NSN part RKB-4 manufactured by El O Matic Usa Inc. We carry a wide range of popular NSN items on our website, including Parts Kit Bearing R like part number RKB-4 which is listed with the NSN 3120013878253 for easy identification. If you are interested in RKB-4 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.