Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 8473 found under Bearing by Chelsea Clock Llc The. The National Stock Number assigned to this part is 3110007199976, 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 8473.