Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NK1B5904 found under Bearing Ball And Ro by Schaeffler Uk Ltd. The National Stock Number assigned to this part is 3110991928742, 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 NK1B5904.