Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 66E3030-10 found under Coil Assembly Fan by Engineered Coil Company. The National Stock Number assigned to this part is 4140009370016, 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 66E3030-10.