Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 02170261 found under Bearing Ball Duplex by J Blackwood And Son Ltd. The National Stock Number assigned to this part is 3110002273596, 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 02170261.