At One Click Purchasing, we are your reliable source for the NSN part 991-001 manufactured by Sun Hydraulics Ltd. We carry a wide range of popular NSN items on our website, including Seal Antipilferage like part number 991-001 which is listed with the NSN 5340015629237 for easy identification. If you are interested in 991-001 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.