Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 520-03-08R01 found under Fan Centrifugal by Racal Health And Safety Inc. The National Stock Number assigned to this part is 4140013258807, 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 520-03-08R01.