Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 00251-02-5 found under Bearing Cup by Hamilton Web Co. The National Stock Number assigned to this part is 3110013590812, 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 00251-02-5.