Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SY4044 found under Fan Tubeaxial by Raytheon Technical Services Company. The National Stock Number assigned to this part is 4140008800262, 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 SY4044.