Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SM1012K+COL found under Fafnir Ball Bearing by Timken Company The. The National Stock Number assigned to this part is 3110013013444, and the Federal Supply Class is 3110 Bearings Antifriction Unmounted. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like SM1012K+COL.