Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number WR3A1 found under Fan Vaneaxial by Nds Inc. The National Stock Number assigned to this part is 4140013319281, and the Federal Supply Class is 4140 Fans Air Circulators And Blower Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like WR3A1.