Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4T-L-217810 AND 4T-L-217849 found under Bearing Roller Tapered by Ntn Bearing Corp. The National Stock Number assigned to this part is 3110009050804, 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 4T-L-217810 AND 4T-L-217849.