Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 421 193.0 0000 found under Bearing Ball And Roller Radial A by Brevini Usa Inc. The National Stock Number assigned to this part is 3110014874833, 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 421 193.0 0000.