Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 63315LLB 2AS found under Bearing Ball Annula by N T N Bearing Corp Of America. The National Stock Number assigned to this part is 3110013426237, 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 63315LLB 2AS.