At One Click Purchasing, we are your reliable source for the NSN part B4186 manufactured by Singer Co The Instrumentation Div. We carry a wide range of popular NSN items on our website, including Filter Band Pass like part number B4186 which is listed with the NSN 5915008387949 for easy identification. If you are interested in B4186 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.