Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3-5669-103 found under Sleeve Cooling Fan by Arrowhead Products Corporation. The National Stock Number assigned to this part is 1560000228584, and the Federal Supply Class is 1560 Airframe Structural Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 3-5669-103.