Using the Request for Quote (RFQ) form provided on this page, you can request competitive procurement options on part number 21-4 ITEM 10 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 21-4 ITEM 10 It is listed as Seat Valve. component manufactured by Liberty Equipment And Supply, specifically under CAGE Code 1A851. It is also accompanied by the NSN 4820014734769 for ease of organization, the first digits of the NSN indicating that the part belongs to FSC 4820 Valves Nonpowered.