Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number WX4000-1-LR found under Recorder Signal Data by Graphtec America Inc. The National Stock Number assigned to this part is 6625014229938, 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 WX4000-1-LR.