Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number H-WK-871 PC19 found under Valve Assembly by Walz And Krenzer Inc. The National Stock Number assigned to this part is 4810015500186, and the Federal Supply Class is 4810 Valves Powered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like H-WK-871 PC19.