Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D-WK-492-A54 ITEM 10 found under Valve Shuttle by Walz And Krenzer Inc. The National Stock Number assigned to this part is 4820012709330, 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 D-WK-492-A54 ITEM 10.