At One Click Purchasing, we are your reliable source for the NSN part R5931-21 manufactured by New England Trawler Equipment Co. We carry a wide range of popular NSN items on our website, including Seal like part number R5931-21 which is listed with the NSN 3950003995239 for easy identification. If you are interested in R5931-21 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.