At One Click Purchasing, we are your reliable source for the NSN part 1657A manufactured by Keystone Bolt And Nut Corp. We carry a wide range of popular NSN items on our website, including Standoff Threaded S like part number 1657A which is listed with the NSN 5340012638344 for easy identification. If you are interested in 1657A 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.