Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number F420CWS4R0WA found under Indicator Wind Speed by Electric Speed Indicator Co. The National Stock Number assigned to this part is 6660009203272, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like F420CWS4R0WA.