Using the Request for Quote (RFQ) form provided on this page, you can request competitive procurement options on part number 16-139 with rapid responses always offered by our staff. To ensure that you locate and procure exactly what you need with ease, we list parts with as much information as we can. For example, part number 16-139 It is listed as O Ring. component manufactured by Metrex Valve Corp, specifically under CAGE Code 21013. It is also accompanied by the NSN 5331011459063 for ease of organization, the first digits of the NSN indicating that the part belongs to FSC .