Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number CN3170 found under Sleeve Pump Drive by Usm Corp. The National Stock Number assigned to this part is 3010008902883, and the Federal Supply Class is 3010 Torque Converters And Speed Changers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like CN3170.