Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number DU500010589 REV 8 ITEM 41 found under Valve Check by Fmc Technologies Inc. The National Stock Number assigned to this part is 4820016252552, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like DU500010589 REV 8 ITEM 41.