Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number FB8 12 8 3B found under Bushing Sleeve by Alden Products Company Inc. The National Stock Number assigned to this part is 3120013538940, and the Federal Supply Class is 3120 Bearings Plain Unmounted. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like FB8 12 8 3B.