Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B4-12 found under Flywheel Comminutor by Fabwright Inc. The National Stock Number assigned to this part is 3660012098460, and the Federal Supply Class is 3660 Industrial Size Reduction Machinery. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like B4-12.