Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 57897 found under Bearing Roller Needle by Thor Power Tool Co Sub Of Stewar. The National Stock Number assigned to this part is 3110001203085, 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 57897.