Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4183-600-03 found under Fan Tubeaxial by H R Simon And Company Inc. The National Stock Number assigned to this part is 4140012461897, 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 4183-600-03.