Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A4812SS found under Bearing Ball Linear Motion by Thomson Industries Inc. The National Stock Number assigned to this part is 3110002939573, 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 A4812SS.