At One Click Purchasing, we are your reliable source for the NSN part B74189 manufactured by O T S I. We carry a wide range of popular NSN items on our website, including Collar Shaft like part number B74189 which is listed with the NSN 3040015270074 for easy identification. If you are interested in B74189 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.