Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 9F7166 found under Collar Clutch Shaft by Caterpillar Inc. The National Stock Number assigned to this part is 2520007397167, and the Federal Supply Class is 2520 Vehicular Power Transmission Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 9F7166.