Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2A90 found under Fan Centrifugal by Kemp C M Mfg Co. The National Stock Number assigned to this part is 4140000842794, 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 2A90.