At One Click Purchasing, we are your reliable source for the NSN part 166580D manufactured by Dresser Industries Inc. We carry a wide range of popular NSN items on our website, including O Ring like part number 166580D which is listed with the NSN 5331001053317 for easy identification. If you are interested in 166580D 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.