Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 12CKX16 found under Clutch Assembly Friction by Carlson Company Inc The. The National Stock Number assigned to this part is 3010013667240, 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 12CKX16.